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Posted on April 20, 2007 by Ash
A lovely lichen (possibly a Xanthoria species) growing on an ash (Fraxinus excelsior) near Dungworth (close to Sheffield). Photo taken on the 1st of April, 2007.
treeblog news: Set A (Day 23)
Posted on April 21, 2007 by Ash
The spiralling branches of the European beech (Fagus sylvatica).
Photos taken on the 4th of April 2007.
A beech seedling grows amongst beech nut husks and twigs.
The splintered wound of a broken larch (Larix) branch.
Shadows on stones.
treeblog news: Set A (Day 24) - Still no signs of germination.
Posted on April 24, 2007 by Ash
Aaah, the humble cotyledon. The Oxford Dictionary of Biology defines ‘cotyledon’ thus:
A part of the embryo in a seed plant. The number of cotyledons is an important feature in classifying plants. Among the flowering plants, the class known as Monocotyledoneae have a single cotyledon and Dicotyledoneae have two. Conifers have either two cotyledons, as in Taxus (yews), or five to ten, as in Pinus (pines). In seeds without an endosperm [*], e.g. garden pea and broad bean, the cotyledons store food, which is used in germination. In seeds showing epigeal germination e.g. runner bean, they emerge above the soil surface and become the first photosynthetic leaves.
The sycamore (Acer pseudoplatanus) is a non-native yet extremely common tree in Britain. It is dicotyledonous and undergoes epigeal germination.
Posted on April 29, 2007 by Ash
Important progress! A number of treeblog seeds have germinated! Over the past couple of days, tiny seedlings have emerged from the soil. No Scots pine have yet made an appearance, but as of yesterday (Day 31) 9 cider gum and 4 grey alders have been noted. At least I hope that they are trees; it may be that some or all of the seedlings turn out to be weeds. Unfortunately I am currently in the Scottish capital and so have been unable to witness firsthand the emergence of the first treeblog trees. Therefore all information and photographs at present are courtesy of my father (also an A. Peace).
One of the cider gum (Eucalyptus gunnii) seedlings (Day 30).
One of the grey alder seedlings (Day 30).
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