Strand Memorial Herbarium

Family: Asteraceae   Aster Family

Genus: Cirsium   Thistle
Spiny, biennial or perennial herbs (rarely annuals). Thistles of the genus Cirsium are distinguished by their feathery pappus from members of the genus Carduus (plumeless or simple pappus).

Scientific Name: Cirsium P. Mill.
Common Name(s): Hill's Thistle, Hollow-rooted Thistle, Praire Thistle
Growth Type: biennial/perennial
Species Description:

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Caption: ID: Hrb-CIRSS-001 Source: 35mm slide (photo) Credit: Keyword(s): inflorescense, mature

Caption: ID: Hrb-CIRSS-002 Source: 35mm slide (photo) Credit: Keyword(s): inflorescense, leaf, mature

Caption: ID: Hrb-CIRSS-003 Source: 35mm slide (photo) Credit: Keyword(s): leaf, vegetative

Caption: ID: Hrb-CIRSS-004 Source: 35mm slide (photo) Credit: Keyword(s): seed

Caption: ID: Hrb-CIRSS-005 Source: 35mm slide (photo) Credit: Keyword(s): seed

Caption: ID: Hrb-CIRSS-006 Source: 35mm slide (photo) Credit: Keyword(s): seed

Caption: ID: Hrb-CIRSS-007 Source: 35mm slide (photo) Credit: Keyword(s): seed

Caption: ID: Hrb-CIRSS-008 Source: 35mm slide (photo) Credit: Keyword(s): seed

Caption: ID: Hrb-CIRSS-009 Source: 35mm slide (photo) Credit: Keyword(s): seed