All posts from

April 2007

A lovely lichen

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.

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treeblog news: Set A (Day 23)
No seedlings have germinated yet, unfortunately. Come on already!

Posted in Miscellany

In Millstones Wood

twisty beeches

The spiralling branches of the European beech (Fagus sylvatica).

Photos taken on the 4th of April 2007.

beech seedling amongst beech nuts and twigs

A beech seedling grows amongst beech nut husks and twigs.

broken larch branch

The splintered wound of a broken larch (Larix) branch.

shadows on stone

Shadows on stones.

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treeblog news: Set A (Day 24) - Still no signs of germination.

Posted in Gone for a walk

Tricotyledonous sycamore!

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 endosperm is a nutritive tissue that surrounds the developing embryo in a seed.]

The sycamore (Acer pseudoplatanus) is a non-native yet extremely common tree in Britain. It is dicotyledonous and undergoes epigeal germination.

Out walking on the 5th of April, I spied a sycamore seedling with three cotyledons. An amazing mutant tricot! This is the second time I have seen one of these; the first was on a field trip in spring 2005. Back then I was amazed by my lucky find. Although I took it home with me, it rapidly perished due to a long day in the field with no suitable way to preserve it. Back to the 5th of April… This particular day I was walking down a country lane with my friend, and noticing all of the newly germinated seedlings in the edge of the road, I was reminded of my encounter with the tricot. From time to time I would glance into the edge looking for another – and as luck would have it, I found one! I wasn’t taking any chances with this one, so I left it in situ, returning later in the day to collect it. Behold!

mutant sycamore seedling with three cotyledons – 7th April 2007

mutant sycamore seedling with three cotyledons – 7th April 2007

Posted in Miscellany

First treeblog seedlings appear!

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).

Posted in The treeblog trees

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