Micranthes palmeri |
Micranthes tischii |
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Palmer's saxifrage |
Olympic saxifrage, tisch's saxifrage |
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Habit | Plants solitary or in clumps, with bulbils on caudices. | Plants solitary or in groups, with bulbils on caudices. |
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 flattened, 0.4–2 cm; blade ovate to elliptic, 0.5–2.5 cm, fleshy, base attenuate, margins serrate (7–16-toothed), ciliate, surfaces reddish brown-tomentose abaxially, glabrous or rarely glabrate adaxially. |
Inflorescences | 30+-flowered, (flowers sometimes almost secund), very open, lax thyrses, 6–50 cm, hairy proximally, densely so distally. |
(3–)5–15(–18)-flowered, open, flat-topped thyrses or cymes, 2–7 cm, purple-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 spreading to reflexed, ovate; petals greenish, often purple-margined, not spotted, lanceolate to obovate, not clawed, 1.2–2(–2.5) mm, equaling to longer than sepals; filaments linear, flattened; pistils distinct almost to base; ovary superior, (to 1/3 adnate to hypanthium). |
Capsules | green with reddish or purplish tinge, or reddish purple, folliclelike. |
purplish, folliclelike. |
Micranthes palmeri |
Micranthes tischii |
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Phenology | Flowering spring. | Flowering summer. |
Habitat | Rocky, open woodlands | Wet, cool, shaded, thin-soil ledges and rock crevices |
Elevation | 100-1000 m (300-3300 ft) | 1300-2400 m (4300-7900 ft) |
Distribution |
AR; OK |
WA; BC |
Discussion | Of conservation concern. Micranthes tischii is known only from the Olympic Peninsula and from inland, mountainous Vancouver Island, British Columbia (Ogilvie & Beguin 798911, V). Closely related to M. rufidula, M. tischii appears to be highly specialized for its habitat. The unusual persistent, green, not clawed (versus deciduous, white, clawed) petals readily distinguish the two species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 61. | FNA vol. 8, p. 63. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga palmeri, Saxifraga virginiensis var. subintegra | Saxifraga tischii |
Name authority | Bush: Amer. Midl. Naturalist 11: 221. 1928 , | (Skelly) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1021. 2007 , |
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