Micranthes palmeri |
Micranthes petiolaris |
|
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Palmer's saxifrage |
Michaux's saxifrage |
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Habit | Plants solitary or in clumps, with bulbils on caudices. | Plants solitary or tufted, with bulbils on caudices. |
Leaves | basal; petiole flattened, 1–9 cm; blade ovate to elliptic, 2–8 cm, slightly fleshy, base attenuate, margins entire or subentire, ciliate, surfaces tangled, reddish brown-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 | 30+-flowered, (flowers sometimes almost secund), very open, lax thyrses, 6–50 cm, hairy proximally, densely so distally. |
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 erect to ascending, ovate to triangular; petals white, not spotted, broadly oblong to elliptic, not clawed, 3–6 mm, 2+ times as long as sepals; filaments linear, flattened; pistils distinct almost to base; ovary ± superior, (to 1/3 adnate to hypanthium). |
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 | green with reddish or purplish tinge, or reddish purple, folliclelike. |
green to yellow, sometimes purple tinged, valvate |
Micranthes palmeri |
Micranthes petiolaris |
|
Phenology | Flowering spring. | Flowering late spring–early autumn. |
Habitat | Rocky, open woodlands | Wet ledges, boulderfields, and rocky slopes, usually in thin soil over rock |
Elevation | 100-1000 m (300-3300 ft) | 500-2100 m (1600-6900 ft) |
Distribution |
AR; OK |
GA; KY; MD; NC; SC; TN; VA; WV
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Discussion | Micranthes petiolaris (Rafinesque) Brouillet & Gornall is an isonym. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 61. | FNA vol. 8, p. 58. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga palmeri, Saxifraga virginiensis var. subintegra | Hexaphoma petiolaris, Saxifraga michauxii, Saxifraga petiolaris |
Name authority | Bush: Amer. Midl. Naturalist 11: 221. 1928 , | (Rafinesque) Bush: Amer. Midl. Naturalist 11: 225. 1928 , |
Web links |