Micranthes apetala |
Micranthes nudicaulis |
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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 in clusters, stoloniferous, 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, 0.5–3.5 cm, (base expanded, stipulelike); blade somewhat reniform, (± evenly lobed), 0.5–2.5 cm, ± fleshy, base cordate to truncate, margins entire, sparsely glandular-ciliate, surfaces glabrous. |
Inflorescences | 10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
5–20-flowered, branched cymes or flat-topped thyrses, 5–16 cm, sparsely 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 or, sometimes, spreading, triangular; petals white to cream (rarely pink), not spotted, broadly elliptic to ovate, short-clawed, 4–5 mm, longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior, (to 1/3 adnate to hypanthium). |
Capsules | reddish or purplish, folliclelike. |
dark purple-black, valvate. |
2n | = 38. |
= 40. |
Micranthes apetala |
Micranthes nudicaulis |
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Phenology | Flowering early spring–summer. | Flowering summer. |
Habitat | Vernally moist meadows, wet depressions on mountain slopes | Wet flushes, stream banks |
Elevation | 600-2800 m (2000-9200 ft) | 0-800 m (0-2600 ft) |
Distribution |
ID; MT; OR; WA
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AK; e Asia (Russian Far East) |
Source | FNA vol. 8, p. 68. | FNA vol. 8, p. 59. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga apetala, Saxifraga integrifolia var. apetala | Saxifraga nudicaulis |
Name authority | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , | (D. Don) Gornall & H. Ohba: J. Bot. Res. Inst. Texas 1: 1021. (2007) |
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