Appearance
''Cirsium horridulum'' is a biennial herb up to 250 cm tall, with a large taproot and fleshy side roots that sometimes sprout new shoots. Leaves are up to 40 cm long with thick, sharp spines along the edges. There are usually several flower heads, also with sharp spines, each head with disc florets but no ray florets. Flower color varies from one plant to the next: white, yellow, pink, red or purple.
Naming
Varieties⤷ ''Cirsium horridulum'' var. ''horridulum'' - from Maine to Guatemala
⤷ ''Cirsium horridulum'' var. ''megacanthum'' D.J.Keil - from the Florida Panhandle to Texas and Oklahoma
⤷ ''Cirsium horridulum'' var. ''vittatum'' R.W.Long - from North Carolina to Louisiana
Status
It is endangered in Connecticut, New Hampshire, and Pennsylvania. It is listed as threatened in Rhode Island....hieroglyph snipped...References:
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