Micranthes nelsoniana var. carlottae |
Micranthes nelsoniana |
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dotted saxifrage |
dotted saxifrage, heartleaf saxifrage, Nelson's saxifrage, saxifrage |
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Habit | Plants solitary or tufted, with bulbils on branched caudices, rhizomatous. | |||||||||||||||||
Leaves | blades slightly fleshy, margins 9–12 toothed. |
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. |
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Inflorescences | somewhat congested, tangled-ascending hairy. |
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. |
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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). |
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Pistils | connate most of their lengths. |
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Capsules | 6–12 mm. |
green to yellow and purplish tinged to dark purple, valvate. |
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2n | = 72. |
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Micranthes nelsoniana var. carlottae |
Micranthes nelsoniana |
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Phenology | Flowering summer. | |||||||||||||||||
Habitat | Stream banks, wet areas | |||||||||||||||||
Elevation | 0-1000 m (0-3300 ft) | |||||||||||||||||
Distribution |
BC; YT |
AK; OR; WA; AB; BC; NT; NU; YT; Europe (ne Russia); Asia
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Discussion | Variety carlottae is known mostly from the Queen Charlotte Islands and adjacent coastal British Columbia. (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.) |
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Key |
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Source | FNA vol. 8, p. 55. | FNA vol. 8, p. 54. | ||||||||||||||||
Parent taxa | ||||||||||||||||||
Sibling taxa | ||||||||||||||||||
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Synonyms | Saxifraga punctata subsp. carlottae, Saxifraga nelsoniana subsp. carlottae | Saxifraga nelsoniana, Saxifraga punctata subsp. nelsoniana, Saxifraga punctata var. nelsoniana | ||||||||||||||||
Name authority | (Calder & Savile) Gornall & H. Ohba: J. Bot. Res. Inst. Texas 1: 1020. (2007) | (D. Don) Small: in N. L. Britton et al., N. Amer. Fl. 22: 147. 1905 , | ||||||||||||||||
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