Micranthes eriophora |
Micranthes petiolaris |
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redfuzz saxifrage |
Michaux's saxifrage |
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Habit | Plants solitary or in groups, with bulbils on caudices. | Plants solitary or tufted, with bulbils on caudices. |
Leaves | basal; petiole flattened, 0.5–2.5 cm; blade ovate to elliptic, 1–2 cm, ± fleshy, base attenuate, margins sharply serrate, sparsely to densely ciliate (some glandular-tipped), surfaces densely tangled, reddish brown-hairy abaxially, glabrous adaxially. |
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 | 10+-flowered, (flowers often secund), very open, lax, often flat-topped thyrses with distant lateral branches, 6–25 cm, pink- to purplish-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 erect, triangular; petals white, sometimes purplish-tipped, not spotted, obovate to elliptic, not clawed or barely clawed, 4–7 mm, ca. 2 times as long as sepals; filaments linear, flattened; pistils distinct almost to base; ovary 1/3–1/2 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 | purplish, valvate. |
green to yellow, sometimes purple tinged, valvate |
Micranthes eriophora |
Micranthes petiolaris |
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Phenology | Flowering late winter–early summer. | Flowering late spring–early autumn. |
Habitat | Rocky slopes and ledges | Wet ledges, boulderfields, and rocky slopes, usually in thin soil over rock |
Elevation | 1900-3000 m (6200-9800 ft) | 500-2100 m (1600-6900 ft) |
Distribution |
AZ; NM; Mexico (Baja California, Chihuahua)
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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. 64. | FNA vol. 8, p. 58. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga eriophora | Hexaphoma petiolaris, Saxifraga michauxii, Saxifraga petiolaris |
Name authority | (S. Watson) Small: in N. L. Britton et al., N. Amer. Fl. 22: 142. (1905) | (Rafinesque) Bush: Amer. Midl. Naturalist 11: 225. 1928 , |
Web links |