This blog tries to get a bit deeper into the nature of the trees around me, mainly in the Low Weald of Kent.

Saturday, 30 March 2013

March - Ash

The terminal buds of Ash are shaped a bit like French bishops hats, but the lateral buds are almost globular, and often a lot smaller. Here you can see how the stems flatten below out the nodes, easy both to see and to feel, and fairly characteristic of ash.


Here is a good view of some lichens on the smooth bark of a young Ash trunk. You can also see the interesting branch junction with repeated concentric rings - again is it a dying sub-canopy branch in the process of being sealed off?


This is a close-up of the lichens. There are two or three types here, one with creamy white surface and cream craters, the other with a slightly more greeny-white surface, and small black pustular outgrowths. The ora\nge-red staining in the top left might be third type.


Ash is a particularly base-rich (alkaline) bark, and this is quite suitable for lichens. The possible reduction of ash in the country due to the new Chalara disease may therefore well lead to an extinction or near-extinction of quite a few species of rare lichen. Going back to these the lichen to the top left and bottom right might be Lecanora confusa (L.) Vain, and the one to the top right and bottom left could perhaps be Lecidella elaeochrome (Ach.) M. Choisy f. elaeochroma

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