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 altissimum (L.) Hill
Common Name(s): Roadside Thistle, Tall Thistle, Wood Thistle
Growth Type: biennial/perennial
Species Description:
Click on the thumbnails to view large image.
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ID: Hrb-CIRAL-001
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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ID: Hrb-CIRAL-002
Source: 35mm slide (photo)
Credit:
Keyword(s): flowering, inflorescense
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 | Caption:
ID: Hrb-CIRAL-003
Source: 35mm slide (photo)
Credit:
Keyword(s): inflorescense, mature
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 | Caption:
ID: Hrb-CIRAL-004
Source: 35mm slide (photo)
Credit:
Keyword(s): inflorescense, mature
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 | Caption:
ID: Hrb-CIRAL-005
Source: 35mm slide (photo)
Credit:
Keyword(s): seed
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