Cirsium edule var. edule

Common names: Hall’s thistle
Endemic
Synonyms: Cirsium hallii (A. Gray) M. E. Jones
Treatment appears in FNA Volume 19. Treatment on page 147.

Heads usually crowded at stem tips. Peduncles 0–1(–4) cm. Involucres 1.5–2.5 × 1.5–3 cm, thinly to densely arachnoid. Phyllary apices ascending or ± spreading, plane to acicular, spines 1–5 mm. Corollas 14–21 mm, tubes 5–11 mm, throats 4–8 mm, lobes 4–6 mm; style tips 3–4 mm. Cypselae light to dark brown, 3.5–4.5 mm; pappi 9–13 mm.


Phenology: Flowering summer (Jun–Aug).
Habitat: Sea bluffs, roadsides, damp soil at edge of woods, openings in conifer or conifer-hardwood forests
Elevation: 0–900 m

Discussion

Variety edule is known from the coast and coast ranges of Oregon and Washington. Some coastal populations of var. edule approach montane forms of var. macounii in stature, head size, and involucre pubescence. Some of the variation in var. edule may be a result of past introgression with Cirsium remotifolium. Populations of var. edule from within the ranges of C. remotifolium vars. odontolepis, remotifolium, and rivulare often show features of those taxa.

Selected References

None.

Lower Taxa

None.
... more about "Cirsium edule var. edule"
David J. Keil +
Nuttall +
Asteraceae tribe Cynareae +
Hall’s thistle +
Oreg. +  and Wash. +
0–900 m +
Sea bluffs, roadsides, damp soil at edge of woods, openings in conifer or conifer-hardwood forests +
Flowering summer (Jun–Aug). +
Trans. Amer. Philos. Soc., n. s. +
Cirsium hallii +
Cirsium edule var. edule +
Cirsium edule +
variety +