13 October 2010

Rough Star-thistle

A small population of Rough Star-thistle (Centaurea aspersa) has been established at Port Talbot Docks since at least 1987 when it was seen by Gwyn Randall. Although a dockside alien, it is very rare in the UK, so good to see that it has persisted for at least 23 years.
Superficially the plant looks like Common Knapweed, but note the bushy habit, lobed leaves, paler flowers and sharp spines beneath the petals.

1 comment:

Charles Hipkin said...

I guess it has persisted there because it's a perennial. I wonder how much the population has spread in the last 20 years.