Cirsium inamoenum var. inamoenum

Common names: Greene’s thistle
Treatment appears in FNA Volume 19. Treatment on page 135.

Involucres 1.5–5 cm diam. Corollas white or pale lavender. 2n = 32, 34, 36 (as C. subniveum).


Phenology: Flowering summer (Jun–Aug).
Habitat: Arid slopes, roadsides, grasslands, sagebrush scrub, pinyon-juniper woodlands, montane coniferous forests
Elevation: 750–2800 m

Distribution

V19-109-distribution-map.gif

Calif., Idaho, Nev., Oreg., Utah, Wash., Wyo.

Discussion

Variety inamoenum grows from the rainshadow slopes of the Sierra Nevada and Cascades eastward across the northern Basin and Range province to the mountains of southern Idaho, western Wyoming, and northeastern Utah. On the slopes of Steens Mountain in eastern Oregon it forms hybrids with Cirsium eatonii var. peckii. In the Snake Range it apparently hybridizes with C. eatonii var. viperinum.

Selected References

None.

Lower Taxa

None.
David J. Keil +
(Greene) D. J. Keil +
Carduus inamoenus +
Greene’s thistle +
Calif. +, Idaho +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
750–2800 m +
Arid slopes, roadsides, grasslands, sagebrush scrub, pinyon-juniper woodlands, montane coniferous forests +
Flowering summer (Jun–Aug). +
Asteraceae tribe Cynarea +
Cirsium inamoenum var. inamoenum +
Cirsium inamoenum +
variety +