Micranthes nelsoniana |
Micranthes foliolosa |
|||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
dotted saxifrage, heartleaf saxifrage, Nelson's saxifrage, saxifrage |
leafy stem saxifrage, naked-bulbil small-flower-saxifrage, saxifrage à bulbilles |
|||||||||||||||||
Habit | Plants solitary or tufted, with bulbils on branched caudices, rhizomatous. | Plants solitary or tufted, with bulbils on caudices. | ||||||||||||||||
Leaves | 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. |
basal; petiole ± absent; blade oblanceolate, 6–15(–30) cm, ± fleshy, base cuneate, margins subentire, sometimes 1–3-toothed distally, eciliate or sparsely ciliate, surfaces glabrate. |
||||||||||||||||
Inflorescences | 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. |
2(–5+)-flowered, (proximal flowers replaced by bulbils), narrow, branched, sometimes ± open, cylindric thyrses, sometimes solitary flowers, 5–15 cm, glabrous or sparsely purple-tipped stipitate-glandular. (Pedicels erect to ascending.) Flowers: sepals reflexed, lanceolate; petals white, each with 1–2 basal yellow spots, lanceolate, clawed, 3–8 mm, longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior, (to 1/3 adnate to hypanthium). |
||||||||||||||||
Flowers | 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 to yellow and purplish tinged to dark purple, valvate. |
green to purplish, valvate. |
||||||||||||||||
2n | = 56. |
|||||||||||||||||
Micranthes nelsoniana |
Micranthes foliolosa |
|||||||||||||||||
Phenology | Flowering late summer. | |||||||||||||||||
Habitat | Mossy tundra near streams and flushes, wet, rocky slopes, snowbeds | |||||||||||||||||
Elevation | 0-1800 m (0-5900 ft) | |||||||||||||||||
Distribution |
AK; OR; WA; AB; BC; NT; NU; YT; Europe (ne Russia); Asia
|
AK; CO; ME; NL; NT; NU; QC; YT; Greenland; n Europe; n Asia |
||||||||||||||||
Discussion | 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. 57. | ||||||||||||||||
Parent taxa | ||||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Synonyms | Saxifraga nelsoniana, Saxifraga punctata subsp. nelsoniana, Saxifraga punctata var. nelsoniana | Saxifraga foliolosa, Saxifraga foliolosa var. multiflora, Saxifraga stellaris subsp. comosa, Saxifraga stellaris var. comosa | ||||||||||||||||
Name authority | (D. Don) Small: in N. L. Britton et al., N. Amer. Fl. 22: 147. 1905 , | (R. Brown) Gornall: J. Bot. Res. Inst. Texas 1: 1020. 2007 , | ||||||||||||||||
Web links |
|