Anemone lyallii

Britton
Ann. New York Acad. Sci. 6: 227. 1891.
Common names: Little mountain anemone
Endemic
Synonyms: Anemone oligantha Eastwood Anemone quinquefolia var. lyallii (Britton) B.L. Robinson
Treatment appears in FNA Volume 3.

Aerial shoots 5-30(-40) cm, from rhizomes, rhizomes horizontal. Basal leaves 0-1, ternate; petiole 5-8 cm; terminal leaflet sessile to petiolulate, ovate to oblanceolate, (1-)1.5-3(-4) × (0.4-)0.7-1.5(-2) cm, base narrowly cuneate, margins serrate to crenate on distal 1/2-2/3, apex acuminate to narrowly acute, rarely obtuse, surfaces glabrous, rarely puberulous; lateral leaflets unlobed or occasionally nearly lobed. Inflorescences 1-flowered; peduncle distally puberulous or nearly glabrous throughout; involucral bracts 3, 1-tiered, ternate, ±similar to basal leaves, bases distinct; terminal leaflet sessile to petiolulate, ovate to oblanceolate, (1-)1.5-3(-4) × (0.4-)0.7-1.5(-2) cm, bases narrowly cuneate, margins serrate to crenate on distal 1/2-2/3, apex acuminate to narrowly acute, rarely obtuse, surfaces glabrous, rarely puberulous; lateral leaflets unlobed or occasionally nearly lobed. Flowers: sepals 5(-7), white, pink, or sometimes blue-tinged, oblong, rarely narrowly ovate, 3.5-8(-10) × 1.5-3(-3.5) mm, glabrous; stamens 10-30(-35). Heads of achenes nearly spheric; pedicel 1-3(-4) cm in fruit. Achenes: body elliptic, flat, 3-4 × 1-1.5 mm, not winged, white-puberulous; beak subulate, sometimes slightly curved, ca. 0.5 mm, glabrous. 2n=16.


Phenology: Flowering spring–summer (Mar–Jul).
Habitat: Shaded woods, subalpine ridges
Elevation: 200-1900 m

Distribution

V3 1033-distribution-map.gif

B.C., Calif., Oreg., Wash.

Discussion

Anemone lyallii may occasionally intergrade with A. oregana west of the Cascades in northern Oregon (C. L. Hitchcock et al. 1955-1969, vol. 2). The area of probable intergradation should be extended to the southern limits of both species where they are sympatric.

Selected References

None.

Lower Taxa

None.

... more about "Anemone lyallii"
Bryan E. Dutton +, Carl S. Keener +  and Bruce A. Ford +
Britton +
Little mountain anemone +
B.C. +, Calif. +, Oreg. +  and Wash. +
200-1900 m +
Shaded woods, subalpine ridges +
Flowering spring–summer (Mar–Jul). +
Ann. New York Acad. Sci. +
Anemone oligantha +  and Anemone quinquefolia var. lyallii +
Anemone lyallii +
species +