Micranthes oregana |
Micranthes hieraciifolia |
|
---|---|---|
bog saxifrage, Oregon or bogsaxifrage, Oregon saxifrage |
hawkweed-leaf saxifrage |
|
Habit | Plants solitary or in clusters, with caudex or thick, fleshy rhizomes. | Plants mostly solitary, with short caudices, sometimes rhizomatous. |
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 sometimes indistinct, flattened, 2–4 cm; blade ovate to elliptic, 2–6 cm, ± fleshy, base cuneate to slightly attenuate, margins usually ± evenly serrulate to denticulate, ciliate, surfaces sparsely to densely hairy and sparsely stipitate-glandular. |
Inflorescences | (30–)50+-flowered, open to ± crowded, conic to cylindric thyrses, 25–125 cm, hairy proximally, yellow- to pink-tipped stipitate-glandular distally. |
30+-flowered, constricted, spikelike thyrses, 7–30 cm, tangled-hairy proximally, densely purple-tipped stipitate-glandular distally. |
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 spreading to reflexed, triangular to ovate; petals dark reddish purple, not spotted, narrowly ovate to lanceolate, slightly clawed, 1.5–3 mm, equaling sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior. |
Capsules | green to reddish purple, folliclelike. |
reddish to purple, valvate. |
2n | = 38, 76. |
= 112, 120. |
Micranthes oregana |
Micranthes hieraciifolia |
|
Phenology | Flowering early spring–summer. | Flowering summer. |
Habitat | Bogs, marshes | Wet, mossy tundra, streamsides, ledges, crevices |
Elevation | 100-2500 m (300-8200 ft) | 0-2000 m (0-6600 ft) |
Distribution |
CA; CO; ID; MT; NV; OR; WA; AB
|
AK; MT; BC; NT; NU; YT; Greenland; Europe; Asia |
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.) |
In British Columbia, Micranthes hieraciifolia is disjunct between the far north and the Okanagan-Thompson Plateau in the south (S. A. Harris 2003). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 67. | FNA vol. 8, p. 66. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga oregana, Saxifraga montanensis, Saxifraga oregana var. montanensis | Saxifraga hieraciifolia, Saxifraga hieraciifolia var. angusticapsula, Saxifraga hieraciifolia var. rufopilosa |
Name authority | (Howell) Small: in N. L. Britton et al., N. Amer. Fl. 22: 138. 1905 , | (Waldstein & Kitaibel ex Willdenow) Haworth: Saxifrag. Enum., 45. 1821 (as hieracifolia) , |
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