Micranthes oregana |
Micranthes californica |
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bog saxifrage, Oregon or bogsaxifrage, Oregon saxifrage |
California saxifrage, Greene's saxifrage |
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Habit | Plants solitary or in clusters, with caudex or thick, fleshy rhizomes. | Plants solitary or in clumps, with bulbils on caudices, or 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 flattened, 2–5 cm; blade ovate, 2–7 cm, fleshy, base attenuate, margins serrate, rarely subentire, 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. |
20+-flowered, (flowers often secund), open, lax thyrses with distant lateral branches, 15–30(–40) cm, 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, 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. |
Capsules | green to reddish purple, folliclelike. |
purplish, folliclelike. |
2n | = 38, 76. |
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Micranthes oregana |
Micranthes californica |
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Phenology | Flowering early spring–summer. | Flowering winter–early spring. |
Habitat | Bogs, marshes | Shaded fields, rocky or unstable slopes, stream banks |
Elevation | 100-2500 m (300-8200 ft) | 0-1500 m (0-4900 ft) |
Distribution |
CA; CO; ID; MT; NV; OR; WA; AB
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CA; OR; Mexico (Baja California)
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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.) |
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Source | FNA vol. 8, p. 67. | FNA vol. 8, p. 64. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga oregana, Saxifraga montanensis, Saxifraga oregana var. montanensis | Saxifraga californica, M. parvifolia, Saxifraga fallax, Saxifraga hallii, Saxifraga parvifolia, Saxifraga virginiensis var. californica |
Name authority | (Howell) Small: in N. L. Britton et al., N. Amer. Fl. 22: 138. 1905 , | (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 140. (1905) |
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