wolvobirder's picture

Thistle

Observed: 14th July 2011 By: wolvobirder
Black Country and Staffordshire Naturalists
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Carduus-1
Carduus-1 1
Carduus-1 1 2
Carduus-1 1 2 3
Carduus-1 1 2 3 4
Description:
Identifications
Species interactions

No interactions present.

Species with which Creeping Thistle (Cirsium arvense) interacts

Comments

wolvobirder's picture

creeping thistle

I didn't think creeping thistle had winged spines on the stem.

However, I do realise that my Collins guide says that Plymouth Thistle is rare/causal outside of the Plymouth/Devon area, which is why I only went for "it might be this".

John

wolvobirder's picture

Comment

Has no one read my comment above? I am not saying that others are wrong, but if you think it is creeping thistle then an explanation would be nice as to why.

Thanks, John

wolvobirder's picture

Is it that the bracts are too

Is it that the bracts are too short for Plymouth Thistle? I think they probably are. No one has yet to comment about the winged spikes on the stem though.

Tiggrx's picture

Yes, the bracts are the wrong

Yes, the bracts are the wrong shape for Plymouth Thistle. Also, flower colour and general plant habit are wrong.

You are right that Creeping Thistle does not have winged stems, however it often does have spiny stems, especially lower down the stem. I think your plant is just spiny rather than winged.

The pale pinkish colour of the flowers is very typical of Creeping Thistle, most other thistles have a much darker purplish colour.

wolvobirder's picture

Thanks

Ok thanks Aaron, that is exactly the kind of thing I wanted to know :)

The spines certainly did seem to widen out into wings but I think they might not have been frequent enough along the stem. I guess it could of hybridised with something else?

If it is still there when I next visit I will have to check again.

Thanks again, John.