Micranthes apetala |
Micranthes odontoloma |
|
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tiny swamp saxifrage, western swamp saxifrage |
brook saxifrage, stream saxifrage, streambank saxifrage |
|
Habit | Plants solitary or in clusters, with bulbils on caudices, or short-rhizomatous. | Plants solitary or sometimes grouped, rhizomatous. |
Leaves | basal; petiole flattened, 0.5–3 cm; blade ± ovate, 2–5 cm, ± fleshy, base attenuate, margins entire or crenulate, eciliate, surfaces hairy. |
basal; petiole rounded, 2–30 cm; blade round, 7–40 cm, thin to slightly fleshy, base cordate to truncate, margins regularly dentate, eciliate, surfaces sparsely brownish hairy abaxially, glabrous adaxially. |
Inflorescences | 10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
10–30+-flowered, open, lax, flat-topped thyrses, 20–65(–85) cm, glabrous proximally, purple-tipped subsessile-glandular distally. |
Flowers | sepals erect to ascending, ovate; petals absent, sometimes 1–5, white to greenish white, not spotted, linear to oblong, clawed, 1–2 mm, much shorter than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior. |
sepals reflexed, ovate to elliptic; petals white, each with 2 basal yellow spots, round to broadly elliptic, clawed, 3–4.5 mm, longer than sepals; filaments strongly club-shaped, (to 6 mm); pistils connate ca. 1/2 their lengths; ovary superior. |
Capsules | reddish or purplish, folliclelike. |
green to purple, ± folliclelike. |
2n | = 38. |
= 24, 48. |
Micranthes apetala |
Micranthes odontoloma |
|
Phenology | Flowering early spring–summer. | Flowering summer–early autumn. |
Habitat | Vernally moist meadows, wet depressions on mountain slopes | Wet meadows and stream banks |
Elevation | 600-2800 m (2000-9200 ft) | 1500-4000 m (4900-13100 ft) |
Distribution |
ID; MT; OR; WA
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AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
|
Source | FNA vol. 8, p. 68. | FNA vol. 8, p. 56. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga apetala, Saxifraga integrifolia var. apetala | Saxifraga odontoloma |
Name authority | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , | (Piper) A. Heller: Muhlenbergia 8: 60. 1912 , |
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