pjt347's picture

Is This a Thistle?

Observed: 2nd May 2011 By: pjt347pjt347’s reputation in Plants
DSC05616 1

Found in an overgrown part of an allotment. Not sure what it is and if the white powder like substance on the leaves is a herbicide.

Species interactions

No interactions present.

Species with which Milk Thistle (Silybum marianum) interacts


corylus's picture

Where is the white substance?

Could be powdery mildew.Ask to find out if spraying has been done.There is usually a chemical type smell and foliage turning colour if its a herbicide.

Hazel Trevan

cabbageleek's picture


The whitish variegation of the leaves is typical of Milk Thistle.