Micranthes spicata |
Micranthes tolmiei |
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alpine saxifrage, Tolmie's alpine saxifrage, Tolmie's saxifrage |
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Habit | Plants solitary or tufted, short, thick-rhizomatous. | Plants mat-forming, (stems trailing, thin, basally slightly woody), with slender, woody caudices. |
Leaves | 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. |
cauline, proximally crowded; petiole absent; blade elliptic-obovate, 0.8–1.5 cm, fleshy, base cuneate, margins entire, sometimes proximally sparsely long-ciliate, surfaces glabrous. |
Inflorescences | 15+-flowered, congested, spikelike thyrses, 15–50(–70) cm, tangled, pink- to purple-tipped stipitate-glandular. |
2–10-flowered, lax cymes, sometimes solitary flowers, 3–12 cm, glabrous or purplish- or pink-tipped stipitate-glandular; (bracts 1–3, proximal). |
Flowers | 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). |
sepals erect to spreading, ovate; petals white, not spotted, linear to oblanceolate, 2.5–5 mm, longer than sepals, short- or not clawed; filaments broadly club-shaped (± petaloid); pistils connate to 1/2 their lengths; ovary ± superior (to 1/4 adnate to hypanthium). |
Capsules | green, purplish tinged, ± folliclelike, (basally connate). |
green, purple mottled, valvate. |
2n | = 30. |
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Micranthes spicata |
Micranthes tolmiei |
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Phenology | Flowering summer. | Flowering summer. |
Habitat | Wet tundra, heaths, moist, rocky areas, streamsides | Arctic and alpine tundra, fell-fields |
Elevation | 0-1700 m (0-5600 ft) | 500-4000 m (1600-13100 ft) |
Distribution |
AK; YT |
AK; CA; ID; MT; NV; OR; UT; WA; BC
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Discussion | Unlike those of most Micranthes species, the leaves of M. tolmiei are proximally cauline and the ovules have two integuments. The seeds have a loose, winglike testa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 57. | FNA vol. 8, p. 54. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga spicata | Saxifraga tolmiei, Saxifraga tolmiei var. ledifolia |
Name authority | (D. Don) Small: in N. L. Britton et al., N. Amer. Fl. 22: 146. (1905) | (Torrey & A. Gray) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1022. 2007 , |
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