Vikki's picture

Spear thistle

Observed: 8th August 2009 By: Vikki
S159 Neighbourhood Nature - current student
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Spear thistle - Cirsium vulgare
Description:
Identifications
Species interactions

No interactions present.

Species with which Spear thistle (Cirsium vulgare) interacts

Comments

Jonathan's picture

Yes, this is spear thistle.

Yes, this is spear thistle. This could be confirmed by looking at the leaf which should end in a solid triangle, like a spear head. It is a biennial, which means it dies after flowering. The creeping thistle has an underground rhizome (which is how it creeps!) by which it spreads, the flowers are smaller and the leaves don't end in a spear. Spear thistles often have a whole fauna living on them: aphids, ants and all the things that go for aphids.

Jonathan
University of Edinburgh and Biodiversity Observatory (OU)