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#16
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Mystery weed: red stems, gets big
In message , kay
writes Rachel 101;919717 Wrote: Thank you so much for all the replies - it's really good of you all. Kay, the leaves are not hairy, and neither is the stem: sorry again, I should have made that clear. No, it was my english that was the problem - I was rejecting those suggestions on the grounds that they were hairy, which yours most clearly wasn't. Yours looks exactly like "the other" weedy species of Epilobium, and I'm never sure which that is, having never sat down with a key and identified it. But I noticed one yesterday in my garden, and thought "that looks exactly like the one on urg". Problem is, it only grows to about 1 foot or 18inches high. The red colouring can be a function of cultivation - eg drier soil. The one I was looking at was growing out of an old brick wall and definitely had he red colouring. So - forgive me for suggesting this - is it possible a) that you're wrong about the 3-4ft b) that the plant you've photographed is growing close to the 3-4ft one but isn't it? I have the weedy Epilobium growing in and amongst rosebay, and when I'm weeding in early spring it's easy to get them muddled, even though they are so different. Incidentally Fitter et al describe E montanum as "short to medium" which is up to 2ft. Poland ("Vegetative key to the British Flora" gives "to 75cm" for both E. parviflorum and E. montanum. He also says that E. montanum often has red stems. (It was my impression that E. parviflorum was the most likely to show red stems.) Of the hairy-leaved species he says that E. hirsutum has stem-clasping to decurrent leaves, and E. parvifolium sessile to shortly petiolate leaves. Reading between the lines, the extreme forms can be distinguished to species by the nature of the leaf attachments, but the intermediate forms can't. Willowherbs have a tendency to have alternate leaves higher up the stem. Poland says that this tendency is stronger in E. hirsutum than E. parviflorum. I think you're going to have to let one plant of it flower - it's the only way you're going to get an id. Poland does give a vegetative key to Epilobium. But it depends on the use of a hand lens - one batch of three species is keyed out by the presence of fine hairs not visible to the naked eye (and from my experience not detectable by touch either, which works with some other taxa). -- Stewart Robert Hinsley |
#18
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Mystery weed: red stems, gets big
In article ,
says... kay;919384 Wrote: Try Rosebay or Rosebay Willowherb (they're the same thing) Kay, thank you for such a quick answer: I originally thought it was Rosebay Willowherb but I wasn't at all sure that it had such rhubarb-red stems. Typically, I can't find any pictures of it when young! I've now managed to get a picture of it on the internet: http://tinyurl.com/6cs9fbp Does this turn into Rosebay Willowherb? Rachel 101 Sorry ignore my last post, I have just seen your picture in your second post and its definately one of the willow herbs -- Charlie Pridham, Gardening in Cornwall www.roselandhouse.co.uk Holders of national collections of Clematis viticella cultivars and Lapageria rosea |
#19
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Mystery weed.. Barnyard Grass?
Just stumbled across this researching my own mystery plant. Was it a common barnweed `Echinochloa crus-galli`?
I'm pretty sure thats what's appeared in my garden. It has thick, rhubarb red stems, which are flatter at the base. It has the sort of feel and look of a large grass. Bit late to this but curious if anybody's still following! |
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