Every Wednesday, I hope to find a new ‘weed’ to investigate. My only criterion will be that I will not have deliberately planted the subject of our inquiry. Who knows what we will find…..

Dear Readers, as I walked home  through Muswell Hill on a cold Sunday morning, I was surprised to hear the sound of buzzing, and to see not one but three bumblebees feeding from these sputnik-shaped flowers. Japanese aralia is an exotic, but as more and more bumblebee nests are surviving the winter it has become a valuable source of nectar and pollen. A  glance at the flowers put me in mind of ivy, which is not surprising as both are members of the Araliaceae family, and there is at least one hybrid between  this plant and an ivy.

The genus name ‘Fatsia’ comes from an old Japanese word for ‘eight’, and if you look at the leaves you’ll see that they usually have eight ‘fingers’ (though they can have seven, or nine). As you might guess from this, the plant is native to southern Japan and South Korea. The Japanese name for the plant is ‘Yatsude’, meaning ‘eight-hand’. Whatever the number of lobes, the leaves are evergreen, shiny, and rather attractive. However, as you can see in the photo below, even evergreens may have an ‘autumn’, when older leaves turn yellow and drop off – I have a viburnum in a pot which did this this year, to my horror. However, it’s now doing well, so I can breathe again.

Japanese aralia is a great plant for shady conditions and heavy soils, and so it should be a shoo-in for my north-facing, claggy-soiled garden, if only I had a bit more room. However, I have a very dark side-return which is currently home to potted camellias, a daphne and a climbing hydrangea, so maybe I will find a spot for one here (they’re hardy down to -14 degrees, so hopefully that should be ok). I am somewhat tempted by this new variety, though in my experience you’re often better off with the old faithfuls.

I absolutely see the point of raising native flowers in some habitats: I have friends in the US and in Australia who do this, and I think that there’s a real need to support wildlife by growing the plants that evolved with them to be the perfect source of food and shelter. In London, though, there are already so many foreign species that I think it’s a case of deciding which will benefit creatures such as pollinators when no native plants are in flower, or available as food for larvae. For example, winter-flowering plants such as Mahonia and Fatsia fill a feeding gap for over-wintering bumblebee queens and for the nests that survive these days.

Although Japanese aralia is sometimes known as the castor-oil plant, it is not related to the actual castor-oil plant (Ricinus communis), although the leaves are similar. This is important for several reasons, particularly because the ‘true’ castor-oil plant is extremely poisonous. You will sometimes find Fatsia japonica labelled as ‘false castor-oil plant’, to add to the confusion. This is why Latin names are so important -at least we all know that we’re talking about the same thing.

In Japan, the shoots of Fatsia japonica are harvested and used as a vegetable, and very tasty they look too…

Japanese aralia has been used as an anti-inflammatory in Japan and Taiwan, and hence in the treatment of such conditions as osteoarthritis and rheumatism. In folklore those huge eight-pointed hand-shaped leaves were thought to repel devils, and the plant was grown on the north side of the house from whence these enemies were thought to come (though as this is presumably also the coldest side it seems like a bit of a risk for the plant.).

Dear Readers, last week I described how the ginkgo trees in Japan were among the few to survive the bombings of Hiroshima and Nagasaki, and today I found this photo essay on the effects of those bombs. And here is a photo of the shadow of Fatsia japonica leaves left on a telegraph pole following the flash from the bomb at Hiroshima. What happened to the plant eventually is not recorded. At a time when the idea of nuclear war, so long considered unthinkable, has become a ‘viable option’ for some leaders of the Free World, it’s as well to stop to consider what it really means. Some of the other photos in the essay show exactly what happens when you drop a nuclear device on other human beings.

And, following the disaster at Fukoshima, Japanese poets have also been concerned with the effects of the radiation released by natural forces. In the collection ‘Reverberations from Fukushima: 50 Japanese Poets Speak Out’, Setsuko Okubu, who lived in Fukushima, considers the effect of this devastating event on her home:

In “To My Home,” Setsuko Okubo affirms, “Our prime blessing is brought by the soil..inherited and guarded.” In the first and last stanzas, the repetition of the names of wild plants they used to gather serves as a litany.

To My Home

Butterbur sprouts, five-leaf aralia, fatsia sprouts, bracken, and parsley.
When the mountains are ready
for the sprouting of plants,
the rice fields are dug, and the fields are cultivated,
calves are born,
horses are pastured,
and chickens lay eggs.
It’s a season full of life.
In the fall
Ears of rice rustle.
The smell of rice heralds the harvest.

. . . . . . . . . . .

Then, “In a twinkle it vanished../ life-taking radiation —/ contaminated my home”

We had to slaughter the cows that we had tenderly watched over.
We abandoned our racehorses that we had raised with the utmost care,
left our houses, fields, and livestock, and evacuated.
We drift from shelter to shelter as refugees.

. . . . . . . . . . .

Spring has rolled around again.
Butterbur sprouts, five-leaf aralia, fatsia sprouts, bracken, and parsley.
They are waiting to be picked
on the desolate land.

My heart goes out to people everywhere who have to leave everything that they know and leave their homes, whether through natural disaster or war, drought or famine. It sometimes seems as if the whole world is on the move, and this will only increase as climate change makes areas uninhabitable. Building walls against others is no solution. We need to learn to live with people who are different from us, and we need to learn fast. We have always been the adaptable ape, and I hope this will stand us in good stead in the future, though some days I despair. But not today, because the bees are feeding on the Japanese aralia, and will go home with full stomachs to survive another day.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Every Wednesday, I hope to find a new ‘weed’ to investigate. My only criterion will be that I will not have deliberately planted the subject of our inquiry. Who knows what we will find…..

Dear Readers, my visit to East Finchley cemetery last week was the gift that just keeps on giving. I felt that this venerable tree deserved more than a few lines in a longer piece, and so this week I want to look at the ginkgo, a popular street and cemetery tree here in North London, and yet one which I have often hurried past. Before anyone gets over-excited, this is quite clearly not a ‘weed’ by any normal definition, but have you ever tried finding a ‘weed’ in mid-November which, after nearly four years of weekly posts, hasn’t been covered? Flexibility will be required from hereon in, I suspect.

Gingko is immediately identifiable from its leaves. No other living tree has fan-shaped foliage, but fossilised ginkgo leaves have been found from 270 million years ago. The tree existed at the same time as mare’s tail, which was a Wednesday Weed a few weeks ago, but, unlike that plant, poor ginkgo really is the last of its kind. There is nothing else alive that is remotely like it.

Once I spotted one ginkgo, I found them everywhere: at the end of Archway Road, in St Pancras and Islington Cemetery, and on Durham Road. But they are, in some ways, problematic. Ginkgo trees have separate sexes ( the technical term is dioecious), but each sex has some disadvantages as a street tree. The female trees produce a fruit which looks a little like an apricot (the name ‘ginkgo’ is said to come from a misspelling of the Japanese name for the plant, which means ‘silver apricot’) but if this falls and starts to rot, it is said to produce a smell that combines the odour of vomit with the stench of rancid butter. The pollen of the male trees, which naturally produce no fruit, is highly allergenic, and so not good for hay fever sufferers. Nonetheless, the tree is beautiful enough for groundskeepers everywhere to keep planting it.

Incidentally, among its many peculiarities is the fact that the male ginkgo produces sperm which is covered in tiny mobile hairs that enable it to move. In this, ginkgo is similar to mosses and algae, but completely different from flowering plants. It has several adaptations to a time before these competitors came along: for example, it grows very quickly to a  height of about 10 meters before extending any side shoots, which was probably because most plants at this time were ferns and horsetails, and so the need was to get as high as possible as quickly as possible, and then to shade out everybody else.

Not only is the ginkgo a very ancient species, but individual trees are both resilient and long-lived. Six ginkgos which were within 2 kms of the epicentre of the Hiroshima atomic bomb blast survived, and are given the honorable name of ‘hibakujumoku’, or ‘survivor trees’.

At the Tsurugaoka Hachimangu Shinto shrine in Japan a giant ginkgo which had stood beside the staircase since the creation of the building in 1063 finally collapsed in 2010. A botanist who examined it declared that the trunk had rotted. It was thought that that was the end, until both the original tree stump and a piece of the tree planted nearby started to produce a fine crop of new leaves.

If you go into any chemist, you are likely to see herbal preparations with pictures of that distinctive fan-shaped leaf on the box. It is often marketed as a way of delaying the effects of old age, perhaps because the tree itself is so sprightly, and we hope to acquire some of its characteristics. It is said to be beneficial for macular degeneration, dementia, forgetfulness generally, ‘post-menopausal cognitive decline’ ( I guess that’s when I start a sentence and have no idea what I meant to say by the time I get to the end), post-stroke recovery, arterial disease and tinnitus. Oh that it did half of what it says on the packet, but sadly scientific trials have all currently drawn a blank. There is also some fear that if you are taking a blood-thinner such as warfarin or coumadin, overdoing it with the gingko will result in rather thinner blood than you were hoping for. On the other hand, Chinese doctors have been using ginkgo since 2800 BC, so I refuse to lose hope. The plant is certainly full of interesting chemicals such as amentoflavone (which can inhibit the uptake of certain medications) and ginkgolic acid, which is highly allergenic, so maybe these can be turned from ‘the dark side’.

You might think that there would be nothing edible to be found on a ginkgo tree, what with all that talk of the smell of the fruit, but the seeds of the ginkgo (once the smelly stuff is removed) are a traditional food in both China and Japan. In particular, they form part of a celebratory dish called ‘Buddha’s Delight’ which is served at Chinese New Year, a time when a vegetarian diet is thought to bring good luck. And very tasty it looks too.

Whilst researching this piece, I came across this painting by the Japanese artist Watanabe Shotei, and promptly fell in love with it. I like the way that the crow is framed, and the way that the autumn-yellow ginkgo leaves are scattering as she flies through them. This is very different from his other, more formal work, and I think that it sums up the mischievousness of the bird as it ploughs through the august foliage. Or maybe it’s just me.

And finally, there is a belief that even in the shedding of its leaves, the ginkgo is not like other trees. Whilst the oak leaves and the maple leaves drop off one at a time, all the leaves from a ginkgo are said to fall in one night. I can’t say I’ve seen much evidence of that happening with the trees that I know, but maybe this is the case in harsher climates. The poet Howard Nemerov had this to say on the subject:

Late in November, on a single night

Not even near to freezing, the ginkgo trees

That stand along the walk drop all their leaves

In one consent, and neither to rain nor to wind

But as though to time alone: the golden and green

Leaves litter the lawn today, that yesterday

Had spread aloft their fluttering fans of light.

What strange communication occurs between these ancient trees, I wonder, and what complex combination of chemical signals would give rise to such a thing? The more I learn about trees, the less I know.

 

Every Wednesday, I hope to find a new ‘weed’ to investigate. My only criterion will be that I will not have deliberately planted the subject of our inquiry. Who knows what we will find…..

Dear Readers, I spotted this tree in East Finchley cemetery last week and, although it is most definitely not a weed, I decided to indulge myself and find out a bit more about it. After all, it is native to Great Britain (albeit only in a tiny corner of south-western Ireland, where it seems to have survived the last ice age) and is a popular street tree – in ‘London’s Street Trees‘ Paul Wood points out that it can be found in Bermondsey, Haggerston, Vauxhall and Holloway, and that there is even an Arbutus Street in Dalston. The Irish connection gave it its alternate names of ‘Irish strawberry tree’ or ‘cane apple’ (from caithne, the Irish name for the tree). Elsewhere, it can be found around the Mediterranean and Western Europe.

The tree is not related in any way to the strawberry that we have for dessert: in fact, it’s a member of the heather family (Ericaceae), something that can be seen more clearly in the flowers than in the fruits. The tree bears both simultaenously, which makes for an attractive and long-lasting display.

The fruits are edible, but, much like the avocados that I sometimes buy, they take twelve months to ripen and then spoil very quickly. The species name unedo means ‘I eat only one’, and is attributed to Pliny the Elder. Whether he meant that one was enough, or that one was so delicious that no more were required is open for debate. I now regret that, in the interests of citizen science, I didn’t try one. There were certainly enough of them about.

The fruit is can be used in a variety of ways: here is a rather attractive crumble cake, for example.

However, as is so often the case, the main use of the fruit turns out to be in the making of alcoholic beverages. In Portugal, the wild fruit is used to make Medronho a 48% proof brandy that is drunk at breakfast to ‘waken the spirits’. In Albania it’s used to make rakia (not to be confused with the aniseed flavoured raki) and can be up to 90% proof. All I can say is that these folk are made of much stronger stuff than me. One glass of prosecco and I’m dancing on the table.

For something slightly less alcoholic, here is a recipe for Irish Strawberry Liquer from the splendid Talk of Tomatoes blog.

The fruit can also be used to make jam, and here is a recipe from the Maremma region of Italy which sounds rather splendid.

What with its fruit and flowers and evergreen foliage, the strawberry tree is a great tree for a small garden, where every plant has to earn its keep. The flowers are pollinated by bees, birds like the fruit (even if we are wary of it) and it has a variety of ecosystem advantages: it can grow in very poor soil, and helps to stabilise it: it is salt-tolerant, and so useful for coastal gardens:it’s fire-resistant: and the thick leaf-cover helps to protect birds and insects during the winter.

Pliny did, however, note that it should not be kept close to bee-hives, for the nectar gives a bitter flavour to honey.

The strawberry tree forms part of the coat of arms of the Spanish city of Madrid, which shows a bear eating the fruits from the plant. There are still about 230 brown bears in the Cantabrian mountains of Spain, and I love to think of them stretching up to eat the berries. There is some indication that the bears may also eat the fermented fruit and collapse in an alcoholic stupor, much as they do in other places where such bounty is available.

In a complete digression, I remember seeing the paw prints of a sloth bear in a forest in India, and being amazed at how human they looked, just like the bare feet of a small child. These creatures resemble us in many ways.

In Italy, the tree, with its red fruit, white flowers and green leaves (the colours of the Italian flag), was seen as a symbol of the unification of the country during the 19th Century.

Medicinally, the leaves of the  strawberry tree have been used for a wide variety of purposes – they are said to be astringent, diuretic, urinary anti-septic, antiseptic, intoxicant, rheumatism, tonic, and have more recently been used in the therapy of hypertension and diabetes. The leaves certainly contain quercetin, which is an anti-oxidant, and are said to have anti-inflammatory properties.

Now, I have referred previously to Hieronymos Bosch’s painting ‘The Garden of Earthly Delights’, and the way that folk can be seen to be wrestling with strawberries, carrying strawberries, and even eating strawberries. I took it for granted that the fruit in question was from the wild strawberry. However, the painting was recorded in the inventory of the Spanish monarch as ‘La Pintura del Madroño‘ – ‘the painting of the strawberry tree’. Have a  look at those giant fruits and see what you think. I suspect that I was right the first time.

And finally to our poem. I am indebted to Greene Deane at the Eat the Weeds website for finding this Irish folk song on the subject of the Arbutus, or strawberry tree. Do pop over to the blog for fascinating information on all things foragable (this may be a new word). Like so many folk songs, it starts well enough, but gets rather less pleasant as we approach the end.

My Love’s An Arbutus

My love’s an arbutus
By the borders of Lene,
So slender and shapely
In her girdle of green.
And I measure the pleasure
Of her eye’s sapphire sheen
By the blue skies that sparkle
Through the soft branching screen.

But though ruddy the berry
And snowy the flower
That brighten together
The arbutus bower,
Perfuming and blooming
Through sunshine and shower,
Give me her bright lips
And her laugh’s pearly dower.

Alas, fruit and blossom
Shall lie dead on the lea,
And Time’s jealous fingers
Dim your young charms, Machree.
But unranging, unchanging,
You’ll still cling to me,
Like the evergreen leaf
To the arbutus tree.

Photo Credits

Photo One (Flowers) by By muffinn from Worcester, UK (Ameixial – strawberry tree Arbutus unedo flowers) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

Photo Two (Cake) by By Nzfauna – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=39656416

Photo Three (coat of arms) by By Valadrem (http://valadrem.blogspot.com) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY-SA 2.5-2.0-1.0 (https://creativecommons.org/licenses/by-sa/2.5-2.0-1.0)], via Wikimedia Commons

 

 

 

 

 

 

 

 

 

 

Every Wednesday, I hope to find a new ‘weed’ to investigate. My only criterion will be that I will not have deliberately planted the subject of our inquiry. Who knows what we will find…..

Dear Readers, if there is one lesson in life that I should have learned by now, it’s ‘don’t put off till tomorrow what you can do today’. When I was in Milborne St Andrew in Dorset last week, I spotted this delightful patch of scarlet pimpernel, every flower open in the sunshine. But, alas, I had milk and rich tea biscuits to buy, and a copy of Woman’s Weekly to pick up, so I hurried past instead of stopping to take a photograph.

For the next three days,  the flowers were closed up tight, what with the fog, and the cold, and the afternoon shadows. And so I’m afraid my photos show them in their ‘coy mode’. However, here is what they look like when they’re in full sun. The plant has alternative names like ‘poor man’s weather glass’ and ‘shepherd’s clock’; the flowers are said to open at 8 a.m. and close at about 2 p.m. unless there’s cloudy or damp weather, in which case they may not bother to put in an appearance at all. I don’t blame them. Now that the clocks have gone back and it’s dark before 5 I often feel like huddling under the duvet with a hot chocolate and a good book.

This plant is a member of the primrose family (Primulaceae) but as far as I know it’s the only  red species. Scarlet seems to be pushing it a bit though – it’s more of an orangey-red. But I am very fond of it – it’s small and unobtrusive, but repays close attention. It’s a plant of arable farmland and seaside environments, such as dunes and cliffs. It is native to the UK and to the whole of Europe, North Africa and Western Asia, but has ended up being transported to almost everywhere else in the world, probably with grain crops.

In the Mediterranean area (and, I’ve learned, in some parts of the UK)  there is a rather lovely blue form, which gives rise to yet another alternative name, ‘blue-scarlet pimpernel’.

Despite its demure appearance, however, scarlet pimpernel has a fearsome reputation. It is said that it causes gastroenteritis in dogs and horses, rabbits and poultry, and the seed is said to be poisonous to birds. Fortunately, it also apparently has a very acrid and unpleasant taste, and so most animals avoid it. The plant can also be used as an insecticide (which is probably why it developed the toxins in the first place). However, scarlet pimpernel has also been used medicinally, and in Germany it’s known as Gauchheil (‘Fool heal’) and used to be made into a treatment for those who were melancholy or otherwise mentally indisposed.The  genus name, Anagallis, comes from the Greek ‘to laugh’, and was said to indicate the mood of someone when their depression was lifted.

Of course, many people unfamiliar with this small red flower will be well aware of the novels of Baroness Orczy, who wrote the first of many books featuring The Scarlet Pimpernel in 1905. The Scarlet Pimpernel was a chivalrous gentleman who, with his band of loyal followers (‘ one to command and nineteen to obey’) worked to rescue French aristocrats who were destined for the guillotine. As you might expect from the name, the Scarlet Pimpernel left a flower at the scene of his rescues, and also used the symbol in his correspondence. Even if you are unfamiliar with the Pimpernel himself, you might be familiar with some of the parodies that his derring-do inspired, such as the Bugs Bunny episode featuring The Scarlet Pumpernickel, or the programme ‘Nob and Nobility’ in the third series of Blackadder that featured the eponymous hero’s disgust with the adulation accorded to the ‘bloody Pimpernel’.

This action-packed series of novels was the inspiration for many films and television series and radio plays, with probably the most famous cinematic version being the 1934 film starring Leslie Howard and and Merle Oberon.

A poem from the novel has passed surreptitiously into common usage:

‘We seek him here, we seek him there,
Those Frenchies seek him everywhere.
Is he in heaven?—Is he in hell?
That demmed, elusive Pimpernel.’

You might recognise the first line from The Kinks 1966 song ‘Dedicated Follower of Fashion’.

Anyhow, enough excitement! Let’s get back to the plant.

It was believed that holding scarlet pimpernel in the hand would confer the gift of second sight, and also that the plant could give protection from enchantment and spells. I imagine that much of what we now see as mental illness might have been seen as the effect of witchcraft or demonic possession in earlier times, and so the plant’s use has remained consistent – if you are not ‘in your right mind’ for whatever reason, scarlet pimpernel seems to have been the go-to remedy.

It was used to make ‘pimpernel water’, which was considered to be a remedy for freckles (though as they are rather delightful I hardly think they need a ‘remedy’), and also for rough and discoloured skin.

In spite of their allegedly acrid flavour and rich collection of toxins, the leaves have been used in salads, especially in Germany and France. They certainly look very toothsome, but I would be a bit careful if I was you.

This blog often leads me to some very interesting places. In the search for art associated with The Scarlet Pimpernel, I discovered the wonderful illustrator Luisa Rivera, who is originally from Chile but is now based in London. She has recently illustrated a Spanish language edition of the novel by Baroness Orczy, and the cover illustration is below. For more of her dreamy, folkloric illustrations, have a look here. I particularly like the lady with the owl, but they are all haunting and original.

And finally, as you might expect, my search for a scarlet pimpernel poem has been somewhat hindered by about five hundred separate references to ‘They seek him here, they seek him there’ etc etc etc ad nauseum. But then, peeping through the rough grassland of the Google ads comes this tiny gem, by the Irish poet Paula Meehan. It’s called ‘Death of a Field’ and I think it’s both deeply poignant and beautifully observed. We need more homes, but let’s not forget what’s lost. To read it, click here. I will be looking out for Paula Meehan in future.

Photo Credits

Photo One (Scarlet Pimpernel flowers) by Pauline Eccles [CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons

Photo Two (blue scarlet pimpernel ) by  Zachi Evenor, cropped by User:MathKnight – File:Anagallis-arvensis-Horashim2014-Zachi-Evenor.jpg, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=39109428

Photo Three (Nob and Nobility) by By Source, Fair use, https://en.wikipedia.org/w/index.php?curid=28399167

Photo Four (Film 1934) by https://en.wikipedia.org/w/index.php?curid=9780067

Photo Five (Cover illustration from The Scarlet Pimpernel) from http://www.luisarivera.cl/la-pimpinela-escarlata/ 

 

 

 

Every Wednesday, I hope to find a new ‘weed’ to investigate. My only criterion will be that I will not have deliberately planted the subject of our inquiry. Who knows what we will find…..

Dear Readers, during a long-overdue walk through St Pancras and Islington Cemetery last week, I spotted some mare’s tail (Equisetum arvensis) growing on a single grave. I wonder what the conditions were to produce such a crop, but only on this one site? Truly, the ways of the plant kingdom are a mystery, although I note that mare’s tail was once said to be an indicator of underground water. The cemetery is studded with such streams, so perhaps this is an explanation

At first glance mare’s tail resembles grass or a rush, but closer inspection shows that it is actually a living fossil that has been in existence for over 100 million years. Its structure is unique to this family of plants, with a whirl of spikey ‘leaves’ around each stem. Back in the good old days of the Carboniferous period, mare’s tail could grow into a magnificent tree 30 metres tall, and the fossils from these plants can sometimes be found in coal deposits, for Equisetum species formed a large part of this fossil fuel. These days Equisetum plants are of more modest stature, but are still worth a close look, because nothing else like them still exists. The giant dragonflies that I mentioned in my post last week would have been very familiar with these plants.

In German, mare’s tail is known as Zinkraut or tin-herb, because the stems contain silicate, absorbed from the soil in a way that is very unusual in plants. Mare’s tail is useful as an abrasive and cleaning-agent for metal, especially tin, and another English name is scouring-rush. A member of the Equisetum family is used in Japan in the last stage of woodworking, producing a finer finish than any sandpaper.

This is one of those plants that looks very different as the seasons pass, and this is because it produces two different kinds of growth. In spring, the fertile shoots look more like fungi than plants: in fact although I’m familiar with the summer foliage of mare’s tail, I was completely flummoxed by the buds when I visited Canada last year. These are what enable the plant to reproduce, but don’t photosynthesise.

As the year goes on, the plant develops photosynthetic foliage, both to survive and to create the conditions for reproduction during the following spring. Both kinds of shoot come from a complicated network of rhizomes under the soil.

But by autumn, all that’s left are a few of the main whorls of stems.

The plant proved to be an inspiration to the father of logarithms, John Napier. I remember using my logarithmic tables for O level Maths way back in 1976, but these days I imagine it’s all done with computers, and logarithms have gone the way of the slide rule. As you will probably remember, a logarithmic scale is a nonlinear way of describing something which has a very wide range of values. For example, the Richter Scale for measuring earthquakes is a logarithmic scale: an earthquake with a value on the Richter Scale of 6 is ten times stronger than one with a value of 5.

Napier noticed the way that the nodes on the mare’s tail got closer together as they approached the tip of the plant. That’s difficult to see on the older plants in my photos, but have a look at these fresh young greater horsetails, and you’ll see what caught his eye. I love the way that patterns in nature influence both scientists and artists.

Incidentally, Richard Mabey (in Flora Britannica) reports that in some places, mare’s tail is known as ‘Lego Plant’ because it comes apart at the nodes, and can be put back together again. It can also be used as a fungicide – mare’s tail boiled in water has been used with some success against rose mildew.

In herbal medicine only the photosynthetic summer parts of the plant are used, usually as an astringent or for the treatment of nosebleed.

I would be remiss if I didn’t note that mare’s tail is sometimes considered to be a most pernicious weed. The RHS describe it as a plant that is ‘ is an invasive, deep-rooted perennial weed that will spread quickly to form a dense carpet of foliage, crowding out less vigorous plants in beds and borders’. Those rhizomes have got a lot to answer for! The RHS notes that simply pulling the plant up will just make things worse, as the plant can regenerate from the tiniest bits of root, (although if you are going to attempt this, the best time is when the fertile shoots appear in April) and suggests a range of chemical options. It also suggests battering the plant with a rake before applying the weedkiller, which could be therapeutic if nothing else. I have rather a ‘live and let live’ attitude to perennial weeds in my garden, which involves pulling them up or cutting them back if they get too enthusiastic, but tolerating them in small numbers. Life is too short for all-out war, surely.

I have been unable to find any works by the Old Masters (or indeed Old Mistresses) of mare’s tail, but here is an illustration of the Cretaceous period, featuring a most splendid equisetum on the right hand side, plus various assorted reptiles sunning themselves on the bank. I note some Gingko trees as well, which could well be another Wednesday ‘weed’ at some point in the future. You’ll note that my definition of ‘weed’ is becoming more and more expansive as I tick off the actual ‘weeds’ in my half-mile territory. Well, after almost four years I have already featured nearly 200 of the little darlings.

And for the poem? I have a humdinger this week by Anne Stevenson, who traces the path from mare’s tail through coal to the mining communities that extracted it and are now gone. As you know, I don’t cut and paste poems from living writers, because this is how they earn their crust. But please do click through here to read the poem, which is full of wonders. You won’t be disappointed, I promise.

Photo Credits

Photo One by By Alex Lomas – Equisetum arvense, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=44451880

Photo Two by By Namazu-tron – Self shot by mobile phone, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2935195

Photo Three by By F. Lamiot (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY 2.5 (http://creativecommons.org/licenses/by/2.5)], via Wikimedia Commons

Photo Four by By MPF (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons

Photo Five by By Rror (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons