Micranthes apetala |
Micranthes spicata |
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tiny swamp saxifrage, western swamp saxifrage |
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Habit | Plants solitary or in clusters, with bulbils on caudices, or short-rhizomatous. | Plants solitary or tufted, short, thick-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, 4–15 cm; blade round, ovate, or reniform, 3–15 cm, thin, base cordate, margins serrate to dentate, ciliate, surfaces hairy to glabrate. |
Inflorescences | 10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
15+-flowered, congested, spikelike thyrses, 15–50(–70) cm, tangled, pink- to purple-tipped stipitate-glandular. |
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, oblong to ovate; petals cream to yellowish, not spotted, oblong, not clawed, 3–4.5 mm, longer than sepals; filaments narrowly club-shaped; pistils connate at least 1/2 their lengths; ovary superior, (to 1/3 adnate to hypanthium). |
Capsules | reddish or purplish, folliclelike. |
green, purplish tinged, ± folliclelike, (basally connate). |
2n | = 38. |
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Micranthes apetala |
Micranthes spicata |
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Phenology | Flowering early spring–summer. | Flowering summer. |
Habitat | Vernally moist meadows, wet depressions on mountain slopes | Wet tundra, heaths, moist, rocky areas, streamsides |
Elevation | 600-2800 m (2000-9200 ft) | 0-1700 m (0-5600 ft) |
Distribution |
ID; MT; OR; WA
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AK; YT |
Source | FNA vol. 8, p. 68. | FNA vol. 8, p. 57. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga apetala, Saxifraga integrifolia var. apetala | Saxifraga spicata |
Name authority | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , | (D. Don) Small: in N. L. Britton et al., N. Amer. Fl. 22: 146. (1905) |
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