Flora of North America species comparison

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Cirsium remotifolium var. rivulare
Photo is of parent taxon

Klamath thistle
Corollas

usually purple (infrequently cream-colored), 20–25 mm, tubes 8–12 mm, throats 5–6 mm, lobes 6–8 mm.
Phyllaries

imbricate or subequal, linear, margins and/or apices regularly spinulose-serrulate, sometimes weakly expanded and scarious.
2n

= 32.

Cirsium remotifolium var. rivulare
Phenology Flowering late spring–summer (May–Aug).
Habitat Sea bluffs, river valleys, meadows, grasslands, open coniferous or mixed coniferous-hardwood forests
Elevation 10–1200 m (0–3900 ft)
Distribution
from FNA
CA; OR
Discussion

Plants of var. rivulare occur in the western Klamath Mountains of southwestern Oregon and northwestern California and the adjacent coastal plain. Although these plants are usually slender and erect with well separated leaves, they assume a compact growth form in maritime habitats.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 131.
Parent taxa Asteraceae > tribe Cardueae > Cirsium > Cirsium remotifolium
Sibling taxa
C. remotifolium var. odontolepis, C. remotifolium var. remotifolium
Synonyms C. acanthodontum, C. oreganum
Name authority Jepson: Man. Fl. Pl. Calif., 1164. (1925)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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