Tuesday, January 16, 2018

A first spring development

I look at M3 practically every day now to seen any signs of spring ahead.  There seems to be very little, but in the last week or so these leaves of cuckoopint (Arum maculatum) have emerged by the old yew log in the penumbra area.


The leaves are beautifully fresh and green and, in this example, patterned with purple black spots (hence the specific name maculatum, I suppose).  These spots only occur on some of the plants and I have read that they are caused by a fungus Melanustilospora ari.  

Tuesday, January 02, 2018

Ash bark lichens, changing winds

The start of 2018 has been depressingly grey and wet so I was pleased to find something to attract my attention.  The smooth grey bark of the ash tree has quite a few scarcely visible, circular patches of lichen.  I think the species might be Opegrapha atra though this is very close to O. herbarum and some other species.  Getting an accurate determination will need microscope work I think.


On a rather larger level there have been further changes to the area surrounding M3 inasmuch a large whitebeam that has grown some 20 metres west of the project has blown down.  The reason is, I suspect, that many oaks were removed in the autumn from a garden to the north and this has allowed winds from the north to topple the whitebeam.  With the incense cedar to the south this will make a considerable change to the pattern of wind circulation in and around M3, though I doubt whether I shall be able to disentangle the effects of this from changes brought about by increased light levels and other factors.