Micranthes oregana |
Micranthes stellaris |
|
---|---|---|
bog saxifrage, Oregon or bogsaxifrage, Oregon saxifrage |
saxifrage étoilée, starry saxifrage |
|
Habit | Plants solitary or in clusters, with caudex or thick, fleshy rhizomes. | Plants tufted or mat-forming, with ± branched caudices or stolonlike rhizomes. |
Leaves | basal; petiole indistinct, flattened, 3–10 cm; blade linear to oblanceolate, 6–25 cm, fleshy, base cuneate, margins serrulate to denticulate, ciliate, surfaces glabrous or sparsely 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 | (30–)50+-flowered, open to ± crowded, conic to cylindric thyrses, 25–125 cm, hairy proximally, yellow- to pink-tipped stipitate-glandular distally. |
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, ovate to triangular; petals white, not spotted, broadly elliptic to obovate and 2 times as long as sepals, sometimes oblanceolate and equaling or shorter than sepals, clawed, 2–5 mm; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior, often appearing superior in fruit. |
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 to reddish purple, folliclelike. |
green to purple, valvate. |
2n | = 38, 76. |
= 28. |
Micranthes oregana |
Micranthes stellaris |
|
Phenology | Flowering early spring–summer. | Flowering summer. |
Habitat | Bogs, marshes | Mossy tundra near streams, rocky, gravelly seepage areas |
Elevation | 100-2500 m (300-8200 ft) | 0-500 m (0-1600 ft) |
Distribution |
CA; CO; ID; MT; NV; OR; WA; AB
|
LB; NU; QC; Greenland; Europe |
Discussion | In both habitat and morphology, Micranthes oregana is similar to M. pensylvanica. A thorough investigation of the two species, especially the populations in Colorado that are disjunct from those in Montana, is needed to clarify relationships. The name Saxifraga integrifolia was misapplied to M. oregana by early California authors. (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. 67. | FNA vol. 8, p. 57. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga oregana, Saxifraga montanensis, Saxifraga oregana var. montanensis | Saxifraga stellaris |
Name authority | (Howell) Small: in N. L. Britton et al., N. Amer. Fl. 22: 138. 1905 , | (Linnaeus) Galasso: Atti Soc. Ital. Sci. Nat. Mus. Civico Storia Nat. Milano 146: 231. (2005) |
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