Micranthes reflexa |
Micranthes apetala |
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Yukon saxifrage |
tiny swamp saxifrage, western swamp saxifrage |
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Habit | Plants solitary or tufted, with bulbils on caudices. | Plants solitary or in clusters, with bulbils on caudices, or short-rhizomatous. |
Leaves | basal; petiole broadly flattened, 1–2 cm; blade elliptic to broadly ovate, 1–3 cm, fleshy, base attenuate, margins shallowly serrate (teeth to 1 mm), densely ciliate, surfaces tangled reddish brown-hairy. |
basal; petiole flattened, 0.5–3 cm; blade ± ovate, 2–5 cm, ± fleshy, base attenuate, margins entire or crenulate, eciliate, surfaces hairy. |
Inflorescences | 15+-flowered thyrses with flowers crowded at branch tips, 7–60 cm, ± hairy, also with some purple-tipped glandular hairs. |
10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
Flowers | sepals reflexed, ovate to triangular; petals white, with 2 basal yellow spots (spots distinct even in dried material), elliptic to spatulate, clawed, 2–4 mm, longer than sepals; filaments strongly club-shaped, (longer than petals); pistils distinct almost to base; ovary superior, (to 1/3 adnate to hypanthium). |
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 | green to purplish, folliclelike. |
reddish or purplish, folliclelike. |
2n | = 20, 40. |
= 38. |
Micranthes reflexa |
Micranthes apetala |
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Phenology | Flowering late spring–summer. | Flowering early spring–summer. |
Habitat | Heath, tundra, dry to mesic meadows, alpine gravelly slopes and fellfields, open woods | Vernally moist meadows, wet depressions on mountain slopes |
Elevation | 0-1800 m (0-5900 ft) | 600-2800 m (2000-9200 ft) |
Distribution |
AK; BC; NT; YT |
ID; MT; OR; WA
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Discussion | Micranthes idahoensis, M. marshallii, and M. reflexa form a morphological complex of ecologically and geographically distinct entities in western North America that is much in need of study. The eastern North American M. careyana and M. caroliniana are also morphologically similar to the members of this complex. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 63. | FNA vol. 8, p. 68. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga reflexa | Saxifraga apetala, Saxifraga integrifolia var. apetala |
Name authority | (Hooker) Small: in N. L. Britton et al., N. Amer. Fl. 22: 146. (1905) | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , |
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