Micranthes palmeri |
Micranthes hitchcockiana |
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Palmer's saxifrage |
Hitchcock's saxifrage, Saddle Mountain saxifrage |
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Habit | Plants solitary or in clumps, with bulbils on caudices. | Plants solitary or in clumps, short-rhizomatous. |
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 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. |
Inflorescences | 30+-flowered, (flowers sometimes almost secund), very open, lax thyrses, 6–50 cm, hairy proximally, densely so distally. |
70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-tipped stipitate-glandular. |
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). |
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. |
Capsules | green with reddish or purplish tinge, or reddish purple, folliclelike. |
greenish to reddish purple, folliclelike. |
2n | = 76. |
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Micranthes palmeri |
Micranthes hitchcockiana |
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Phenology | Flowering spring. | Flowering late spring–summer. |
Habitat | Rocky, open woodlands | Wet rocks and ledges on mountain-top balds |
Elevation | 100-1000 m (300-3300 ft) | 600-1100 m (2000-3600 ft) |
Distribution |
AR; OK |
OR
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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. 61. | FNA vol. 8, p. 70. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga palmeri, Saxifraga virginiensis var. subintegra | Saxifraga hitchcockiana |
Name authority | Bush: Amer. Midl. Naturalist 11: 221. 1928 , | (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , |
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