Micranthes howellii |
Micranthes apetala |
|
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Howell's saxifrage |
tiny swamp saxifrage, western swamp saxifrage |
|
Habit | Plants solitary or in groups, with bulbils on caudices. | Plants solitary or in clusters, with bulbils on caudices, or short-rhizomatous. |
Leaves | basal; petiole flattened, 1–4 cm; blade oblong to narrowly ovate, 1–2(–3) cm, ± fleshy, base attenuate, margins sharply serrate, eciliate, surfaces sparsely tangled, reddish brown-hairy abaxially, glabrous adaxially. |
basal; petiole flattened, 0.5–3 cm; blade ± ovate, 2–5 cm, ± fleshy, base attenuate, margins entire or crenulate, eciliate, surfaces hairy. |
Inflorescences | 5–10(–20)-flowered, very open, lax, ± flat-topped cymes or thyrses, 5–10(–20) cm, glabrate to sparsely purple-tipped stipitate-glandular; (bracts glabrous). |
10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
Flowers | sepals strongly reflexed, elliptic, (surfaces glabrous); petals white, not spotted, obovate to elliptic, clawed, 2.5–4.5 mm, longer than sepals; filaments linear, flattened; pistils distinct almost to base; ovary ± superior. |
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. |
Capsules | purple, valvate. |
reddish or purplish, folliclelike. |
2n | = 38. |
|
Micranthes howellii |
Micranthes apetala |
|
Phenology | Flowering early spring–early summer. | Flowering early spring–summer. |
Habitat | Wet, rocky ledges and crevices | Vernally moist meadows, wet depressions on mountain slopes |
Elevation | 0-900 m (0-3000 ft) | 600-2800 m (2000-9200 ft) |
Distribution |
CA; OR
|
ID; MT; OR; WA
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Source | FNA vol. 8, p. 63. | FNA vol. 8, p. 68. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga howellii | Saxifraga apetala, Saxifraga integrifolia var. apetala |
Name authority | (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 140. (1905) | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , |
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