Micranthes integrifolia |
Micranthes petiolaris |
|
---|---|---|
Columbian saxifrage, grassland saxifrage, northwestern saxifrage, smooth leaf saxifrage, swamp saxifrage, whole-leaf saxifrage |
Michaux's saxifrage |
|
Habit | Plants solitary or in clumps, (sometimes gynodioecious), often with bulbils on caudices, or short-rhizomatous. | Plants solitary or tufted, with bulbils on caudices. |
Leaves | basal; petiole flattened, 0.5–4 cm; blade narrowly to broadly ovate, 2–7 cm, ± leathery, base attenuate, margins entire or minutely denticulate, usually ciliate, surfaces sparsely to moderately hairy. |
basal; petiole somewhat flattened, 2–6 cm; blade oblanceolate, 2–12 cm, thin, basecuneate to ± attenuate, margins usually 15+-toothed (teeth large, lobelike), densely long glandular-ciliate, surfaces hairy. |
Inflorescences | (15–)20+-flowered, open to ± congested, conic thyrses, (usually branched, lateral cymules ± open), 12–35 cm, densely pink- to purple-tipped stipitate-glandular. |
30+-flowered, very open, lax thyrses, (flowers rarely replaced by bulbils), 10–40 cm, densely tangled, purple-tipped stipitate-glandular; (bracts leaflike, gradually reduced distally). |
Flowers | sepals spreading to slightly reflexed, ovate; petals white, not spotted, obovate, clawed, 2–4 mm, longer than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior. |
slightly bilaterally symmetric; sepals reflexed, oblong to elliptic; petals white, 3 with 2 basal yellow spots, 2 without spots, oblanceolate to spatulate, clawed, 3–4.5 mm, longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior. |
Capsules | reddish or purplish, folliclelike. |
green to yellow, sometimes purple tinged, valvate |
2n | = 38. |
|
Micranthes integrifolia |
Micranthes petiolaris |
|
Phenology | Flowering late winter–spring. | Flowering late spring–early autumn. |
Habitat | Vernally moist meadows, grassy slopes, rock outcrops | Wet ledges, boulderfields, and rocky slopes, usually in thin soil over rock |
Elevation | 0-1800 m [0-5900 ft] | 500-2100 m [1600-6900 ft] |
Distribution |
CA; OR; WA; BC
|
GA; KY; MD; NC; SC; TN; VA; WV
|
Discussion | The occasional occurrence of sterile pollen has been noted in this as well as in other species of Micranthes (as Saxifraga, K. I. Beamish 1961). Some populations exhibit gynodioecism (P. E. Elvander 1982). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Micranthes petiolaris (Rafinesque) Brouillet & Gornall is an isonym. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 67. | FNA vol. 8, p. 58. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga integrifolia | Hexaphoma petiolaris, Saxifraga michauxii, Saxifraga petiolaris |
Name authority | (Hooker) Small: in N. L. Britton et al., N. Amer. Fl. 22: 137. 1905 , | (Rafinesque) Bush: Amer. Midl. Naturalist 11: 225. 1928 , |
Web links |
|