Geum calthifolium

Smith

in A. Rees, Cycl. 16: Geum no. 13. 1810.

Common names: Caltha-leaved avens
Treatment appears in FNA Volume 9. Treatment on page 64. Mentioned on page 60, 63.

Plants subscapose. Stems 8–40 cm, sparsely hirsute proximally, puberulent throughout. Leaves: basal 5–25 cm, blade strongly lyrate-pinnate, sometimes simple, major leaflet 1, minor leaflets 1–7, terminal leaflet much larger than minor laterals; cauline 1.5–4.5 cm, stipules not evident, blade bractlike, not resembling basal, simple. Inflorescences 1–2(–4)-flowered. Pedicels downy, hirsute, eglandular. Flowers erect; epicalyx bractlets 2–6 mm; hypanthium green or green with slight maroon tinge; sepals erect-spreading, 6–11 mm; petals spreading, yellow, obcordate-obdeltate to nearly orbiculate, 9–13 mm, longer than sepals, apex broadly and shallowly emarginate. Fruiting tori sessile, glabrous. Fruiting styles wholly persistent, not geniculate-jointed, 9–14 mm, apex not hooked, pilose in basal 3/4, eglandular. 2n = 42.


Phenology: Flowering summer.
Habitat: Muskegs, moist meadows, heathlands, moist sites on rocky slopes, ledges, and cliffs
Elevation: 0–1500 m

Distribution

V9 90-distribution-map.jpg

B.C., Alaska, e Asia (Russian Far East).

Discussion

Geum calthifolium hybridizes with G. rossii [= G. ×macranthum (Kearney ex Rydberg) B. Boivin]; see discussion under 4. G. schofieldii.

Selected References

None.

Lower Taxa

None.
... more about "Geum calthifolium"
Joseph R. Rohrer +
Caltha-leaved avens +
B.C. +, Alaska +  and e Asia (Russian Far East). +
0–1500 m +
Muskegs, moist meadows, heathlands, moist sites on rocky slopes, ledges, and cliffs +
Flowering summer. +
in A. Rees, Cycl. +
Acomastylis +, Erythrocoma +, Novosieversia +  and Stylypus +
Geum calthifolium +
species +