Micranthes marshallii |
Micranthes stellaris |
|
---|---|---|
Idaho saxifrage, Marshall's saxifrage |
saxifrage étoilée, starry saxifrage |
|
Habit | Plants in groups or sometimes mat-forming, rhizomatous. | Plants tufted or mat-forming, with ± branched caudices or stolonlike rhizomes. |
Leaves | basal; petiole flattened, 3–15 cm; blade ovate, 1–5 cm, ± fleshy, base attenuate, margins shallowly crenate-serrate (teeth ca. 2 mm), eciliate, surfaces sparsely tangled, reddish brown-hairy abaxially, glabrate adaxially. |
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 | 15–50+-flowered, open, lax thyrses, 20–40 cm, purple-tipped stipitate-glandular. |
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 | sepals reflexed, lanceolate to oblong; petals white, with 2 basal yellow spots (often faded when dried), ovate, clawed, 1.5–4.5 mm, longer than sepals; filaments strongly club-shaped, sometimes petaloid (short-clawed, equaling petals); pistils distinct almost to base; 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 | greenish to reddish purple, folliclelike. |
green to purple, valvate. |
2n | = 20. |
= 28. |
Micranthes marshallii |
Micranthes stellaris |
|
Phenology | Flowering spring. | Flowering summer. |
Habitat | Deeply shaded watercourses, stream banks, seeps | Mossy tundra near streams, rocky, gravelly seepage areas |
Elevation | 100-1000 m (300-3300 ft) | 0-500 m (0-1600 ft) |
Distribution |
CA; OR
|
LB; NU; QC; Greenland; Europe |
Discussion | 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. 63. | FNA vol. 8, p. 57. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga marshallii | Saxifraga stellaris |
Name authority | (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 145. 1905 , | (Linnaeus) Galasso: Atti Soc. Ital. Sci. Nat. Mus. Civico Storia Nat. Milano 146: 231. (2005) |
Web links |