Micranthes hitchcockiana |
Micranthes nelsoniana |
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Hitchcock's saxifrage, Saddle Mountain saxifrage |
dotted saxifrage, heartleaf saxifrage, Nelson's saxifrage, saxifrage |
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Habit | Plants solitary or in clumps, short-rhizomatous. | Plants solitary or tufted, with bulbils on branched caudices, rhizomatous. | ||||||||||||||||
Leaves | basal; petiole often indistinct, flattened, 5–50 mm; blade elliptic to obovate, 4–12 cm, slightly fleshy, base cuneate, margins serrate to dentate, densely ciliate, surfaces densely tangled-hairy. |
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 | 70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-tipped stipitate-glandular. |
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, elliptic to ovate; petals white, not spotted, elliptic, clawed, 2–5 mm, longer than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2 inferior, appearing more superior in fruit. |
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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Capsules | greenish to reddish purple, folliclelike. |
green to yellow and purplish tinged to dark purple, valvate. |
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2n | = 76. |
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Micranthes hitchcockiana |
Micranthes nelsoniana |
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Phenology | Flowering late spring–summer. | |||||||||||||||||
Habitat | Wet rocks and ledges on mountain-top balds | |||||||||||||||||
Elevation | 600-1100 m (2000-3600 ft) | |||||||||||||||||
Distribution |
OR
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AK; OR; WA; AB; BC; NT; NU; YT; Europe (ne Russia); Asia
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Discussion | Of conservation concern. Micranthes hitchcockiana may have originated from hybridization between M. rufidula and M. oregana (P. E. Elvander 1984; W. E. Perkins 1978). (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. 70. | FNA vol. 8, p. 54. | ||||||||||||||||
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Synonyms | Saxifraga hitchcockiana | Saxifraga nelsoniana, Saxifraga punctata subsp. nelsoniana, Saxifraga punctata var. nelsoniana | ||||||||||||||||
Name authority | (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , | (D. Don) Small: in N. L. Britton et al., N. Amer. Fl. 22: 147. 1905 , | ||||||||||||||||
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