Micranthes tolmiei |
Micranthes nelsoniana |
|||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
alpine saxifrage, Tolmie's alpine saxifrage, Tolmie's saxifrage |
dotted saxifrage, heartleaf saxifrage, Nelson's saxifrage, saxifrage |
|||||||||||||||||
Habit | Plants mat-forming, (stems trailing, thin, basally slightly woody), with slender, woody caudices. | Plants solitary or tufted, with bulbils on branched caudices, rhizomatous. | ||||||||||||||||
Leaves | 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. |
basal; petiole rounded, 3–30 cm; blade reniform to round, 2–9 cm, thin or slightly fleshy, sometimes thick and fleshy, base cordate, margins deeply crenate, eciliate or sparsely short glandular-ciliate, surfaces glabrous or ± hairy. |
||||||||||||||||
Inflorescences | 2–10-flowered, lax cymes, sometimes solitary flowers, 3–12 cm, glabrous or purplish- or pink-tipped stipitate-glandular; (bracts 1–3, proximal). |
10+-flowered, ± open, lax to congested, conic, sometimes also glomerate thyrses, 10–35 cm, tangled-hairy (pilose-arachnoid) at least distally, sometimes also purple- or brown-tipped stipitate-glandular. |
||||||||||||||||
Flowers | 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). |
sepals reflexed, ± ovate; petals white to pinkish, rarely orange-spotted, ovate to oblong, narrowly to broadly clawed, 2.5–4.5 mm, longer than sepals; filaments distinctly club-shaped; pistils connate 1/2–3/4 their lengths; ovary superior (to 1/3 adnate to hypanthium). |
||||||||||||||||
Capsules | green, purple mottled, valvate. |
green to yellow and purplish tinged to dark purple, valvate. |
||||||||||||||||
2n | = 30. |
|||||||||||||||||
Micranthes tolmiei |
Micranthes nelsoniana |
|||||||||||||||||
Phenology | Flowering summer. | |||||||||||||||||
Habitat | Arctic and alpine tundra, fell-fields | |||||||||||||||||
Elevation | 500-4000 m (1600-13100 ft) | |||||||||||||||||
Distribution |
AK; CA; ID; MT; NV; OR; UT; WA; BC
|
AK; OR; WA; AB; BC; NT; NU; YT; Europe (ne Russia); Asia
|
||||||||||||||||
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.) |
Varieties 6 (5 in the flora). Although sometimes reported for North America, Saxifraga nelsoniana var. aestivalis (Fischer & C. A. Meyer) H. Ohba (S. aestivalis Fischer & C. A. Meyer) is found only in Eurasia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||||||||||
Key |
|
|||||||||||||||||
Source | FNA vol. 8, p. 54. | FNA vol. 8, p. 54. | ||||||||||||||||
Parent taxa | ||||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Synonyms | Saxifraga tolmiei, Saxifraga tolmiei var. ledifolia | Saxifraga nelsoniana, Saxifraga punctata subsp. nelsoniana, Saxifraga punctata var. nelsoniana | ||||||||||||||||
Name authority | (Torrey & A. Gray) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1022. 2007 , | (D. Don) Small: in N. L. Britton et al., N. Amer. Fl. 22: 147. 1905 , | ||||||||||||||||
Web links |
|
|