Showing posts with label Sorbus aucuparia. Show all posts
Showing posts with label Sorbus aucuparia. Show all posts
Monday, January 11, 2016
Chumbawumba tree
Trees are admirably resilient organisms and it usually takes a lot to kill one outright. They can be broken by gales, struck by lightning, flooded, droughted or cut down to ground level and they'll still sprout new growth when spring arrives. Even when they're infected with a fatal fungal disease it can take years for them to die, while all the while they continue to produce seeds. It takes something pretty cataclysmic to kill most trees stone dead.
This rowan, in Backstone bank wood in Weardale, reminds me of the Chumbawumba tune Tubthumping, with its chorus I get knocked down/I get up again/you're never gonna keep me down. If you are not familiar with this particular earworm you can listen to it here. Don't listen for too long - you might never get it out of your head.
It's a mature rowan that was blown over in a gale over fifteen years ago. The windward roots snapped but the leeward roots remained intact and embedded in the soil, so it continued to grow and produce new vertical shoots from the fallen trunk which is slowly subsiding into the woodland floor and is now covered by a carpet of moss. Those new shoots have grown into half a dozen tall, straight trees in their own right.
Where once there was one rowan, now there is a whole row of them. Resilience.
(Double-click on the pictures for a larger, clearer image)
Labels:
Rowan,
Sorbus aucuparia,
Trees
Friday, December 4, 2009
A Tree-spotter's Guide to Buds: part 2
White poplar Populus alba winter buds are covered in a dense felt of fine white hairs that, from a distance, make the twig look as though it's been dipped in white emulsion. The white hairs cover the underside of the leaves too, which flash green and white when they flutter in the breeze in spring and yellow and white when they change colour in autumn.
Alder Alnus glutinosa buds have this beautiful violet-purple sheen that intensies in spring, as the buds begin to swell
Common lime Tilia x europaea buds, which are rounded and have few bud scales, develop a deep crimson hue when they're exposed to sunlight, but on their shaded underside (right hand twig above) they remain green. The purple pigment is produced in response to bright sunlight.
Sweet chestnut Castanea sativa buds are also tinged red but the twigs are chestnut brown. Notice how the buds below the terminal bud sit on a little shelf.
... and this is rowan Sorbus aucuparia, possibly the least attractive buds amongst native species, whose hairy, pointed buds lack shiny scales.
For part 3 see http://cabinetofcuriosities-greenfingers.blogspot.com/2009/12/tree-spotters-guide-to-buds-part-3.html
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