Cirsium scariosum var. toiyabense

Plants erect, subacaulescent to caulescent, 5–55 cm. Stems usually simple, leafy, glabrous to villous or tomentose with septate trichomes, sometimes thinly arachnoid tomentose. Leaves: blades oblong to oblanceolate or elliptic, pinnately lobed or often unlobed, longer spines less than 1 cm, abaxial faces green and ± glabrous to white-tomentose, adaxial faces green, glabrous or villous with septate trichomes. Heads 1–10+, sessile or short-pedunculate, crowded at stem tips, usually subtended and ± overtopped by distal leaves. Involucres 2–3 cm. Phyllaries: outer and mid lanceolate to ovate, spines slender, 2–4 mm; apices of inner acuminate and entire or abruptly expanded into scarious, erose-toothed appendages. Corollas rose-purple, 23–31 mm, tubes 11–16 mm, throats 4.5–8.5 mm, lobes 5.5–8.5 mm; style tips 3.5–4.5 mm. Cypselae 4–6 mm; pappi 22–25 mm.

Phenology: Flowering spring–summer (May–Aug).
Habitat: Meadows, pastures, springs
Elevation: 1250–2300 m

Idaho, Nev., Oreg.

Discussion

Variety toiyabense occurs in the western Basin and Range province from northern Nevada to southeastern Oregon and southwestern Idaho.

Selected References

None.

Lower Taxa