Micranthes hitchcockiana |
Micranthes gormanii |
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Hitchcock's saxifrage, Saddle Mountain saxifrage |
Gorman's saxifrage |
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Habit | Plants solitary or in clumps, short-rhizomatous. | Plants in groups or, sometimes, almost mat-forming, 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 flattened, 5–7.5 cm; blade ovate to elliptic, 3–4 cm, fleshy, base attenuate, margins shallowly crenate-serrate, sparsely ciliate, surfaces tangled, reddish brown-hairy. |
Inflorescences | 70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-tipped stipitate-glandular. |
(10–)30+-flowered, open, lax, strongly divaricately branched, conic thyrses, 8–30 cm, purple-tipped stipitate-glandular; (bracts glabrous, proximal marginally ciliate). |
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 ascending, ovate to oblong, (margins eciliate, surfaces glabrous); petals white, not spotted, obovate to ± round, clawed, ca. 2 mm, ca. 1.5 times as long as sepals; filaments linear, flattened; pistils distinct almost to base; ovary nearly 1/3 inferior, (to 1/3 adnate to hypanthium). |
Capsules | greenish to reddish purple, folliclelike. |
greenish to reddish purple, folliclelike. |
2n | = 76. |
= 20, 38, 40. |
Micranthes hitchcockiana |
Micranthes gormanii |
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Phenology | Flowering late spring–summer. | Flowering spring. |
Habitat | Wet rocks and ledges on mountain-top balds | Wet, rocky ledges and slopes |
Elevation | 600-1100 m (2000-3600 ft) | 0-1000 m (0-3300 ft) |
Distribution |
OR
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OR; WA
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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.) |
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Source | FNA vol. 8, p. 70. | FNA vol. 8, p. 62. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga hitchcockiana | Saxifraga gormanii, Saxifraga occidentalis var. dentata |
Name authority | (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , | (Suksdorf) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1020. 2007 , |
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