Balsamorhiza rosea |
Balsamorhiza subg. Balsamorhiza |
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rosy balsamroot |
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Habit | Plants 6–10(–30) cm. | |
Taproots | relatively slender, bark relatively thin, not corrugated; rhizomes sometimes present (relatively short, deep-seated); caudices seldom branched. |
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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 mostly lanceolate, lance-elliptic, lance-ovate, linear-oblong, oblong, or ovate, often 1–2-pinnatifid or -pinnately lobed, sometimes cordate, ultimate margins usually crenate, dentate, or serrate, seldom entire. |
Cauline leaves | mostly proximal to mid stems. |
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Petioles | mostly shorter than leaf blades. |
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Involucres | hemispheric, 18–20 mm diam. |
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Ray corollas | mostly yellow (becoming brick red and chartaceous in B. rosea). |
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Ray laminae | (becoming brick-red, often drying to pink or rose, and chartaceous) (8–)15(–25) mm (hispidulous abaxially; cypselae strigose). |
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Outer phyllaries | deltate or ovate to lanceolate, 8–12 mm, not surpassing inner. |
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Heads | usually borne singly. |
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2n | = 38. |
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Balsamorhiza rosea |
Balsamorhiza subg. Balsamorhiza |
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Phenology | Flowering Apr–May. | |
Habitat | Dry hills | |
Elevation | 300–400 m (1000–1300 ft) | |
Distribution |
OR; WA
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w North America |
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.) |
Species 9 (9 in the flora). Members of subg. Balsamorhiza usually inhabit shallow, rocky soils. (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 | ||
Subordinate taxa | ||
Synonyms | B. hookeri var. rosea | |
Name authority | A. Nelson & J. F. Macbride: Bot. Gaz. 56: 478. (1913) | unknown |
Web links |