Micranthes californica |
Micranthes ferruginea |
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California saxifrage, Greene's saxifrage |
Alaska saxifrage, rusty hair saxifrage, rusty saxifrage |
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Habit | Plants solitary or in clumps, with bulbils on caudices, or rhizomatous. | Plants solitary or tufted, with bulbils on caudices, short-rhizomatous. |
Leaves | basal; petiole flattened, 2–5 cm; blade ovate, 2–7 cm, fleshy, base attenuate, margins serrate, rarely subentire, ciliate, surfaces hairy. |
basal; petiole indistinct, flattened, to 2 cm; blade spatulate to oblanceolate, 1–8(–10) cm, ± fleshy, base cuneate, margins irregularly serrate (usually with fewer than 12 coarse teeth), ciliate, surfaces hairy. |
Inflorescences | 20+-flowered, (flowers often secund), open, lax thyrses with distant lateral branches, 15–30(–40) cm, purple-tipped stipitate-glandular. |
20–30+-flowered, (flowers sometimes replaced ± completely by bulbils, or bulbils sometimes absent), open, lax thyrses, 10–40 cm, moderately to ± densely purple stipitate-glandular; (bracts reduced). |
Flowers | sepals reflexed, sometimes spreading, triangular to ovate; petals white, not spotted, elliptic to oblong, clawed, 2.5–4.5 mm, longer than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior, appearing superior in fruit. |
± bilaterally symmetric; sepals reflexed, ovate to oblong; petals white, 3 with 2 basal yellow spots, 2 without spots, elliptic to oblanceolate, clawed, 3–5 mm, longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior, (to 1/3 adnate to hypanthium). |
Capsules | purplish, folliclelike. |
green or yellow, sometimes purple tinged, or partly purple, valvate. |
2n | = 20. |
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Micranthes californica |
Micranthes ferruginea |
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Phenology | Flowering winter–early spring. | Flowering summer–early autumn. |
Habitat | Shaded fields, rocky or unstable slopes, stream banks | Wet ledges, seepage slopes, stream banks |
Elevation | 0-1500 m (0-4900 ft) | 10-2700 m (0-8900 ft) |
Distribution |
CA; OR; Mexico (Baja California)
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AK; CA; ID; MT; OR; WA; WY; AB; BC; NT
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Discussion | Plants with bulbils replacing flowers are more common in the southern part (southern Alberta and British Columbia southwards) of the range of Micranthes ferruginea and have been called Saxifraga ferruginea var. macounii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 64. | FNA vol. 8, p. 58. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga californica, M. parvifolia, Saxifraga fallax, Saxifraga hallii, Saxifraga parvifolia, Saxifraga virginiensis var. californica | Saxifraga ferruginea, Saxifraga ferruginea var. macounii, Saxifraga ferruginea var. newcombei, Saxifraga ferruginea var. vreelandii, Saxifraga newcombei |
Name authority | (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 140. (1905) | (Graham) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1020. 2007 , |
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