Showing posts with label William Withering. Show all posts
Showing posts with label William Withering. Show all posts

Sunday, January 15, 2023

Winter bloomer

Last week we found this very early-blooming spurge laurel Daphne laureola coming into bloom on the bank of the river Tyne, near Hexham in Northumberland. I know this plant from one other location, in Wolsingham, Co. Durham, where it may well be of garden origin, but this Tyneside population, of about ten plants (three of flowering size) is the first I've found in Northumberland and it might be native. The black fruits, which ripen in summer, are eaten by birds that disperse the seeds, so it's never certain whether the plants are wild or are of garden origin. 


 Spurge laurel is a very easy plant to overlook unless it's in flower, because its glossy evergreen foliage has some resemblance to a small-leaved Rhododendron.

Click here for a post from 2014 about the Wolsingham plant and its pollinators.

The whole plant is poisonous, but despite its toxicity it was formerly used in what must have been very risky herbal medicine. This is what William Withering (who discovered the medicinal uses of foxglove) has to say about it in his Botanical Arrangement of all the Vegetables growing naturally in Great Britain, published in 1776: 'Very happy effects have been experienced from this plant in rheumatic fevers. It operates as a brisk and severe purgative. It is an efficacious medicine in worm cases; and upon many accounts deserves to be better known to physicians; but in less skilful hands would be dangerous, and it is possessed of considerable acrimony. The whole plant has the same qualities, but the bark of the root is the strongest. Dr. Alston fixes the outside dose at ten grains'.  

(DON'T TRY THIS AT HOME!!!)

Wednesday, December 11, 2013

A bit of a stink


Few of our native wild flowers have such beautiful fruits, but such an unpleasant name, as stinking iris Iris foetidissima. I grew some plants from seed a few years ago and planted them in dry sandy, sun-baked soil under our garden hedge, where they've thrived ever since and produce these lovely seed capsules that open in late November to reveal their spectacular seeds.



















Two other common names, gladdon and roast beef plant are also in common usage and the latter refers to the smell of the crushed leaves that have a powerful aroma of beef (though to me they smell more of roast beef-flavoured crisps, rather than the real meat). In The Englishman's Flora Geoffrey Grigson listed no less than seventeen further common local names used in various parts of the British Isles. A proliferation of such names for a plant is usually a sign that people once found it useful and gladdon has a long history of applications in herbal medicine, mentioned by Dioscorides, William Turner and John Gerard in their herbals. One popular use was as a purgative, made from a decoction of gladdon root and beer.

In his Botanical Arrangement the 18th. century doctor and botanist William Withering, always a good source of contemporary anecdotes, mentions that "the juice of the root of this species is sometimes used to excite sneezing; but it is an unsafe practice, violent convulsions sometimes having been the consequence."























I rather like the flowers that are unspectacular and reminiscent of faded denim, but Withering wasn't so impressed, describing them as being "of a disagreeable purplish ash colour", also mentioning that in his day there was also a variegated-leaved form which now seems to have disappeared from cultivation.






Friday, July 13, 2012

Wildlife on Walls: 9. Biting Stonecrop


Succulent leaves are common in drought-tolerant plants from arid environments but they are not a feature of many plants that are native to Britain's cool, wet summers. This plant, biting stonecrop Sedum acre is an exception. Its small but fleshy, water-retentive leaves allow it to survive long periods of drought on wall tops, roofs, gravel and sand. It also regenerates very easily from small pieces of stem or even from single leaves, so can spread quite quickly once it has established itself. 


It probably gets some of its water from nocturnal dew formation during long, dry periods (remember those?) and as long ago as 1776 the botanist and doctor William Withering speculated that this is how it obtained water. "This plant continues to grow when hung up by the root," he wrote, "which is proof that it receives its nourishment principally from the air, as is the case with most of the succulent plants".

Withering recommended its use in medicine, with some reservations, noting that " It is very acrid. Applied externally it blisters. Taken inwardly it excites vomiting. In scorbutic cases and quartan Agues it is an excellent medicine under proper management."


The acrid, peppery taste is where the 'biting' part of the common name comes from and in Withering's day it was known as pepper stonecrop. 


Biting stonecrop produces a very fine display of starry yellow flowers that are popular with bees and you can cultivate the plant on almost any hard surface where a little dusty humus accumulates. The plant below was growing on bare, rusty metal in the angle of a bridge support and the bottom image shows the plant on a harbour wall in Sunderland.




Monday, January 23, 2012

Spurge Laurel





There are always landmarks in the changing seasons that I look out for and this is one that's particularly welcome at this time of year: spurge laurel Daphne laureola coming into bloom, a sign that spring is creeping a little closer. These lime green clusters of flowers always begin to open at about the same time as snowdrops bloom and depend on bees and butterflies that emerge on mild days for their pollination. In January, the plant is likely to be better served by these insects in southern England  than up here in the North East. The flowers have a faint fragrance, though nothing like as strong as some of the Daphne species grown in gardens.
























When I was a kid growing up in Sussex I used to see spurge laurel quite often in the beech woods on the South Downs but in North East England it's an uncommon plant - but relatively easy to spot in hedgerows at this time of year because it's evergreen. This one is growing in a hedgerow at Wolsingham in Weardale.


Later in the year it produces glossy black berries which are poisonous, but like many poisonous plants it has been used in herbal medicine in controlled doses. The 18th. century botanist and physician William Withering had a high opinion of its therapeutic properties. "Very happy effects have been experienced from this plant in rheumatic fevers", he wrote. "It operates as a brisk and rather severe purgative. It is an efficacious medicine in worm cases; and upon many accounts deserves to be better known to physicians; but in less skilful hands it would be dangerous, as it is possessed of considerable acrimony. The whole plant hath the same qualities, but the bark of the root is the strongest. Dr. Alston fixes the outside dose at ten grains"


Sounds risky, so please don't try this at home - even if you can find kitchen scales that are calibrated in grains. 


Incidentally, Dr. Charles Alston, 1683-1760, quoted by Withering above, was  lecturer in materia medica and botany at Edinburgh University and was the first person to produce opium from poppies in Britain, conducting experiments with it on animals and drawing attention to its potential for pain relief and drug-induced feelings of well-being.