Go to Midwest Weeds Home Page

Field Thistle

Cirsium discolor L.

Asteraceae (Aster Family)

first year rosette

young plant

young plant showing leaf underside (whitish)

bolting plant

stem and leaves

▲▼ flowering plants

 

▲▼ flower buds, showing leafy bracts just below head inflorescences

 

▲▼ flower, with many narrow leaf-like bracts around inflorescence

 

▲ flower, showing the narrow spines and white marks on bracts below flowers  

 

▲ flower close-up 

Field Thistle:

         biennial or simple perennial weed common in southwest Missouri; similar to bull thistle except leaf undersides are white

         leaf bases do not extend down the stems as with bull thistles

         grows 2-5' tall, leaves deeply lobed with slender lobes ending in spines

         flowers purple; flower bracts similar to tall thistle, except they stand out from inflorescence more

         found in pastures, non-crop areas; prefers moister soils

 

Go to Midwest Weeds Home Page