Balsamorhiza rosea |
Balsamorhiza hispidula |
|
---|---|---|
rosy balsamroot |
hairy balsamroot, hispid balsamroot |
|
Habit | Plants 6–10(–30) cm. | Plants 6–40 cm. |
Leaves | blades bright green, narrowly lance-elliptic to lanceolate, (6–)15–25(–40) × (3–)5–9+ cm (1–2-pinnatifid, primary lobes lanceolate to oblanceolate, 10–45 × 2–15 mm, secondary lobes usually divergent, antrorse), bases ± cuneate, ultimate margins usually entire (± revolute and/or thickened, often ciliate), apices acute to attenuate, faces ± hispidulous to hirtellous (gland-dotted as well; veins ± scabrous). |
|
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). |
|
Involucres | hemispheric, 18–20 mm diam. |
campanulate to hemispheric 10–25 mm diam. |
Ray laminae | (becoming brick-red, often drying to pink or rose, and chartaceous) (8–)15(–25) mm (hispidulous abaxially; cypselae strigose). |
15–40 mm (abaxially glabrous). |
Outer phyllaries | deltate or ovate to lanceolate, 8–12 mm, not surpassing inner. |
lanceolate to linear, 12–20 mm, not surpassing inner, apices acute to attenuate (margins often ciliate). |
Heads | usually borne singly. |
borne singly. |
2n | = 38. |
|
Balsamorhiza rosea |
Balsamorhiza hispidula |
|
Phenology | Flowering Apr–May. | Flowering Apr–May. |
Habitat | Dry hills | Basalt scablands and desert-steppe areas, juniper and sagebrush scrublands |
Elevation | 300–400 m [1000–1300 ft] | 1800–2500 m [5900–8200 ft] |
Distribution |
OR; WA
|
AZ; CO; ID; MT; NV; OR; UT; WY
|
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.) |
Distribution of Balsamorhiza hispidula is highly disrupted in the southern part of its range. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 96. | FNA vol. 21, p. 98. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | B. hookeri var. rosea | B. hookeri var. hispidula |
Name authority | A. Nelson & J. F. Macbride: Bot. Gaz. 56: 478. (1913) | W. M. Sharp: Ann. Missouri Bot. Gard. 22: 137, fig. 3, plate 5. (1935) |
Web links |