Bull thistle (Cirsium vulgare)


Note:  The date each picture was taken is included to demonstrate the time of year plants are growing and/or flowering.

Leaf surface
12/16/2002
Leaf surface
12/16/2002
Small rosette
12/16/2002
Small rosette
12/16/2002
Leaf surface and prickles
01/04/2003
Small rosette
01/04/2003
Small rosette
02/22/2003
Small rosette with more round leaves
02/22/2003
Large rosette
03/22/2003
Flower bud ready to open
05/19/2003
Prickles on leaf tip
05/19/2003
Flowers open
06/11/2003
Mature habit
06/11/2003
Stems
06/11/2003
Flower head
06/22/2003
Flowers
06/22/2003
Canada thistle on the left, bull thistle on the right
06/22/2003
Mature seed
07/24/2003
Mature seed
08/15/2003



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