Cirsium edule var. macounii

(Greene) D. J. Keil

Sida 21: 213. 2004.

Common names: Macoun’s thistle
Endemic
Basionym: Carduus macounii Greene Ottawa Naturalist 16: 38. 1902
Synonyms: Cirsium macounii (Greene) Petrak
Treatment appears in FNA Volume 19. Treatment on page 147.

Heads often densely crowded at stem tips. Peduncles 0–5(–10) cm. Involucres 2–4 × 2.5–4 cm, usually densely arachnoid. Phyllary apices widely spreading, long-acicular, spines 5–15 mm. Corollas (15–)18–22 mm, tubes 7–11 mm, throats (4–)5–8.5 mm, lobes (2–)4.5–7 mm; style tips 4–5 mm. Cypselae dark brown, 5–6.5 mm; pappi 20–25 mm. 2n = 34 (as C. edule).


Phenology: Flowering Jun–Oct.
Habitat: Damp soil, mostly montane meadows, forests, alpine
Elevation: 0–1900 m

Distribution

V19-134-distribution-map.gif

B.C., Alaska, Oreg., Wash.

Discussion

Variety macounii ranges from the coastal mountains of southeastern Alaska and British Columbia to Vancouver Island, the Olympic Peninsula, and northern Cascades of Washington, and the mountains of northwestern Oregon.

Selected References

None.

Lower Taxa

None.