Micranthes ferruginea |
Micranthes stellaris |
|
---|---|---|
Alaska saxifrage, rusty hair saxifrage, rusty saxifrage |
saxifrage étoilée, starry saxifrage |
|
Habit | Plants solitary or tufted, with bulbils on caudices, short-rhizomatous. | Plants tufted or mat-forming, with ± branched caudices or stolonlike rhizomes. |
Leaves | 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. |
basal; petiole ± absent; blade obovate to elliptic, 1–5 cm, ± fleshy, base cuneate, margins 1–3-toothed in distal 1/2, ciliate, surfaces hairy. |
Inflorescences | 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). |
2–10-flowered, open, lax cymes, sometimes solitary flowers, (all or some flowers replaced with bulbils, bulbils sometimes absent), 5–20 cm, sparsely to moderately purple-tipped stipitate-glandular. |
Flowers | ± 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). |
sepals reflexed, narrowly elliptic to lanceolate; petals white, each with 1–2 basal yellow spots, lanceolate, clawed, 3–8 mm (2 often slightly larger), longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior, (to 1/3 adnate to hypanthium). |
Capsules | green or yellow, sometimes purple tinged, or partly purple, valvate. |
green to purple, valvate. |
2n | = 20. |
= 28. |
Micranthes ferruginea |
Micranthes stellaris |
|
Phenology | Flowering summer–early autumn. | Flowering summer. |
Habitat | Wet ledges, seepage slopes, stream banks | Mossy tundra near streams, rocky, gravelly seepage areas |
Elevation | 10-2700 m (0-8900 ft) | 0-500 m (0-1600 ft) |
Distribution |
AK; CA; ID; MT; OR; WA; WY; AB; BC; NT
|
LB; NU; QC; Greenland; Europe |
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.) |
Micranthes stellaris is amphi-Atlantic. In Nunavut, it is known only from Baffin Island. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 58. | FNA vol. 8, p. 57. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga ferruginea, Saxifraga ferruginea var. macounii, Saxifraga ferruginea var. newcombei, Saxifraga ferruginea var. vreelandii, Saxifraga newcombei | Saxifraga stellaris |
Name authority | (Graham) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1020. 2007 , | (Linnaeus) Galasso: Atti Soc. Ital. Sci. Nat. Mus. Civico Storia Nat. Milano 146: 231. (2005) |
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