Micranthes apetala |
Micranthes careyana |
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tiny swamp saxifrage, western swamp saxifrage |
Carey's saxifrage |
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Habit | Plants solitary or in clusters, with bulbils on caudices, or short-rhizomatous. | Plants often mat-forming, with extensive rhizomes. |
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 flattened, 1–7 cm; blade rounded or broadly ovate to oblong, 1–7 cm, thin, base truncate, margins coarsely serrate to dentate, sparsely ciliate, surfaces sparsely to ± densely tangled, reddish brown-hairy. |
Inflorescences | 10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
40+-flowered, lax, open thyrses, 10–40(–50) cm, 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 spreading, broadly ovate; petals white, sometimes some with 2 faint, basal yellow spots (sometimes fading upon drying), narrowly ovate to elliptic, clawed, 2–4(–5) mm, 2+ times as long as sepals; filaments linear, flattened; pistils distinct almost to base; ovary superior, (to 1/3 adnate to hypanthium). |
Capsules | reddish or purplish, folliclelike. |
green, ± purple tinged, folliclelike. |
2n | = 38. |
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Micranthes apetala |
Micranthes careyana |
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Phenology | Flowering early spring–summer. | Flowering spring–early summer. |
Habitat | Vernally moist meadows, wet depressions on mountain slopes | Moist soil at bases of vertical or overhanging rock outcrops, seeps |
Elevation | 600-2800 m (2000-9200 ft) | 500-1600 m (1600-5200 ft) |
Distribution |
ID; MT; OR; WA
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AL; GA; KY; NC; TN; VA; WV |
Discussion | Micranthes careyana is very similar to M. caroliniana; both are in need of study. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 68. | FNA vol. 8, p. 61. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga apetala, Saxifraga integrifolia var. apetala | Saxifraga careyana, Saxifraga tennesseensis |
Name authority | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , | (A. Gray) Small: Fl. S.E. U.S., 501. 1903 , |
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