Balsamorhiza rosea |
Balsamorhiza sericea |
|
---|---|---|
rosy balsamroot |
silky balsamroot, silvery balsamroot |
|
Habit | Plants 6–10(–30) cm. | Plants 10–30(–40) cm. |
Basal leaves | blades gray-green, oblong to lance-ovate, 3–10(–20) × 2–5 cm (rarely pinnately lobed), bases weakly cordate or truncate, margins crenate to serrate, apices rounded to acute, faces finely strigose to moderately scabrous (usually gland-dotted as well). |
blades silvery, lanceolate or lance-ovate, 9–30 × 2–7 cm (1-pinnatifid, lobes oblong to oblanceolate, 5–35 × 3–17 mm), bases cuneate, ultimate margins usually entire (plane or weakly revolute, obscurely, if at all, ciliate), apices rounded to acute, faces densely sericeous. |
Involucres | hemispheric, 18–20 mm diam. |
campanulate to hemispheric, 11–20+ mm diam. |
Ray laminae | (becoming brick-red, often drying to pink or rose, and chartaceous) (8–)15(–25) mm (hispidulous abaxially; cypselae strigose). |
15–20 mm (adaxially puberulous on veins). |
Outer phyllaries | deltate or ovate to lanceolate, 8–12 mm, not surpassing inner. |
broadly ovate to triangular-ovate, 12–20 mm, slightly surpassing inner, apices acuminate to attenuate (margins not ciliate). |
Heads | usually borne singly. |
borne singly. |
2n | = 38. |
|
Balsamorhiza rosea |
Balsamorhiza sericea |
|
Phenology | Flowering Apr–May. | Flowering Apr–May. |
Habitat | Dry hills | Serpentine outcrops, among surface rocks, in crevices, hillsides, dry streamsides among cobbles |
Elevation | 300–400 m [1000–1300 ft] | 400–1800 m [1300–5900 ft] |
Distribution |
OR; WA
|
CA; OR
|
Discussion | In a hybrid swarm involving Balsamorhiza rosea and B. careyana, B. rosea remains relatively uncontaminated; the dominance among the hybrids appears to lie with B. careyana. A record of a hybrid between B. rosea and B. careyana from the Spokane area is doubtful. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Balsamorhiza sericea hybridizes with B. deltoidea. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 96. | FNA vol. 21, p. 96. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | B. hookeri var. rosea | |
Name authority | A. Nelson & J. F. Macbride: Bot. Gaz. 56: 478. (1913) | W. A. Weber: Phytologia 50: 358. (1982) |
Web links |