Micranthes apetala |
Micranthes hitchcockiana |
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tiny swamp saxifrage, western swamp saxifrage |
Hitchcock's saxifrage, Saddle Mountain saxifrage |
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Habit | Plants solitary or in clusters, with bulbils on caudices, or short-rhizomatous. | Plants solitary or in clumps, short-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 often indistinct, flattened, 5–50 mm; blade elliptic to obovate, 4–12 cm, slightly fleshy, base cuneate, margins serrate to dentate, densely ciliate, surfaces densely tangled-hairy. |
Inflorescences | 10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-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, elliptic to ovate; petals white, not spotted, elliptic, clawed, 2–5 mm, longer than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2 inferior, appearing more superior in fruit. |
Capsules | reddish or purplish, folliclelike. |
greenish to reddish purple, folliclelike. |
2n | = 38. |
= 76. |
Micranthes apetala |
Micranthes hitchcockiana |
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Phenology | Flowering early spring–summer. | Flowering late spring–summer. |
Habitat | Vernally moist meadows, wet depressions on mountain slopes | Wet rocks and ledges on mountain-top balds |
Elevation | 600-2800 m (2000-9200 ft) | 600-1100 m (2000-3600 ft) |
Distribution |
ID; MT; OR; WA
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OR
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Discussion | Of conservation concern. Micranthes hitchcockiana may have originated from hybridization between M. rufidula and M. oregana (P. E. Elvander 1984; W. E. Perkins 1978). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 68. | FNA vol. 8, p. 70. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga apetala, Saxifraga integrifolia var. apetala | Saxifraga hitchcockiana |
Name authority | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , | (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , |
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