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7th June 2018, Grindleford, Derbys. | Photo: © RWD |
Usually a low plant barely a foot high, and spreading, but can reach the dizzying heights of 1m. Here almost all turned to pods, with just about 5 flowering stalks. Cowberry is top right corner. It likes to grow on heaths and moors, especially with Heather but there is no heather in the immediate vicinity. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
Just 5 weeks into a gloriously sunny May and beginning of June most of the flowers have already turned to fruit: which are inflated pods. Only 4 or 5 flowering stalks left. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
The leaves are hairless, untoothed and simple but are of two types: round to elliptical ones and those on the spines which are approximately linear (best seen half-way down the stem on the right) - although not all spines have them. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
Compared to Gorse the flowers are about half the length (if that). But the stiff woody (not green as in Gorse) spines are just as lethal! |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
The topmost flower is still intact, there are two florets on the side yet to open, but the lower two are in the process of turning to pods (which at present are the green cylinders within the two closely-clasping keel petals) still with the long style attached to the far end of the pod but curling up. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
Why the long face? Very unusual amongst Pea family (Fabaceae) flowers the keel (inner two of the lower petals) is longer than the standard (aka banner). Also - the wings either side of the keel are shorter than the keel.
The lower flowers are turning to fruit, which can be seen as a pale-green cylinder nestling within the keel. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
It is a very rude flower with its 'mouth' wide apart and sticking its 'tongue' out in defiance. A papery white tube sticks out between banner and keel + wings in a provocative way. This tube is part of the anther: the white tube splits into 10 narrow white filaments each bearing a cream-coloured anther. Emerging from this tube is a long style which curves upwards and over. The style is attached to the tip of what will become the bladder-type inflated seed-pod, which at the moment is contained within the white tube. The flower nestles tightly within a pale-green sepal cup with 5 teeth; two on the banner above and three one the lower petals. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
Open wide! A view from above the flower, banner at the top. The lower flower is generating a pod; narrow and pale-green contained within a decaying keel so far. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
A flowering stem with leaves on green stems topped by a small bunch of flowers. The green stem abuts onto the top of a woody stem. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
The rear of the main leaves has a speckly appearance like those on leaves of plants which grow near the sea and have to get rid of an excess of salt through these pores. Petty Whin does sometimes grow next to the seaside, especially in foreign lands, but not particularly in the UK where it is just as likely to be growing well inland, where this specimen was. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
The 'pimples' on the rear of the leaves. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
Sharp! thorns and meandering ribs on the bark which come together then part again in succession on the woody stems. The stiff, very sharp, half-woody spines are curved downwards. Differently shaped (nearly linear) leaves grow on some of the spines. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
The seed pods are inflated bladders, pumped full of a gas. It is a great wonder that the sharp spines do not pop them and deflate them, (or maybe once inflated, they stay that shape even after punctured?). Another Fabaceae plant which has inflated pods is Bladder Senna (Colutea arborescens) but that has larger pods. |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
The inflated pods, at 12 - 20mm long, are shorter than the inflated pods to be found on Bladder Senna (Colutea arborescens) which are 50 - 70mm long! |
7th June 2018, Grindleford, Derbys. | Photo: © RWD |
Each pod still has the style attached at the far end. Pods are green at first turning a muddy colour. |
25th June 2015, Hatchet Pond, nr Beaulieu, New Forest. | Photo: (CC by 2.0) Geoff Toone |
A much more upright and much less sprawling specimen. The spines are much longer and alternate; mostly on the lower parts of the stems rather than in amidst the flowers as in the specimen above this one. |
25th June 2015, Hatchet Pond, nr Beaulieu, New Forest. | Photo: (CC by 2.0) Geoff Toone |
The leaves on this specimen are mostly on the sharp spines, although higher up there are leaves amidst the flowers but no spines. |
25th June 2015, Hatchet Pond, nr Beaulieu, New Forest. | Photo: (CC by 2.0) Geoff Toone |
The spines on this specimen are very long in comparison and not as strongly curved downwards, but no less sharp! |
Some similarities to : Bladder Senna (Colutea arborescens) which also has yellow pea-type flowers and inflated seed pods, but that is much taller (greater than 2m) and the pods at 50 - 70mm much longer than the 12 - 20mm long of Petty Whin. Uniquely identifiable characteristics Distinguishing Feature : No relation to : Petty Spurge (Euphorbia peplus) [a plant with a similar name belonging to different family].
It is a native plant which likes to grow in either sandy or peaty heaths and moors, sometimes near the coast. Some books say the plant can grow up to 1m. It is common in Cornwall, West Wales, and the SE coast of England but more common in the Scottish Highlands in the East and middle of Scotland. A less common name for it is Some sources say it has in the past been used as a yellow dye, but one that is inferior to that found in Woad (Genista tinctoria) which is much more commonly associated with a yellow dye.
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Genista (Greenweeds) |
Pea Family [Fabaceae] |