Micranthes texana |
Micranthes hieraciifolia |
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Texas saxifrage |
hawkweed-leaf saxifrage |
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Habit | Plants solitary or in clumps, with bulbils on caudices. | Plants mostly solitary, with short caudices, sometimes rhizomatous. |
Leaves | basal; petiole flattened, 1–3 cm; blade broadly ovate to oblong, 1.5–3 cm, ± leathery, base ± abruptly attenuate, margins subentire to slightly crenate, eciliate, surfaces glabrate to sparsely hairy. |
basal; petiole sometimes indistinct, flattened, 2–4 cm; blade ovate to elliptic, 2–6 cm, ± fleshy, base cuneate to slightly attenuate, margins usually ± evenly serrulate to denticulate, ciliate, surfaces sparsely to densely hairy and sparsely stipitate-glandular. |
Inflorescences | 20+-flowered, branched, ± capitate thyrses, 10–15 cm, hairy, sometimes purple-tipped stipitate-glandular. |
30+-flowered, constricted, spikelike thyrses, 7–30 cm, tangled-hairy proximally, densely purple-tipped stipitate-glandular distally. |
Flowers | sepals erect, ovate; petals white, not spotted, ± obovate, clawed, 2–3.5 mm, ± equaling sepals; filaments linear, flattened; pistils 3+, connate to 1/2 their lengths; ovary 1/2+ inferior, appearing more superior in fruit. |
sepals spreading to reflexed, triangular to ovate; petals dark reddish purple, not spotted, narrowly ovate to lanceolate, slightly clawed, 1.5–3 mm, equaling sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior. |
Capsules | reddish to purplish, valvate. |
reddish to purple, valvate. |
2n | = 112, 120. |
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Micranthes texana |
Micranthes hieraciifolia |
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Phenology | Flowering late winter–spring. | Flowering summer. |
Habitat | Sandy flats, rocky, open, wooded areas, granite outcrops | Wet, mossy tundra, streamsides, ledges, crevices |
Elevation | 50-500 m (200-1600 ft) | 0-2000 m (0-6600 ft) |
Distribution |
AR; GA; KS; LA; MO; OK; TX |
AK; MT; BC; NT; NU; YT; Greenland; Europe; Asia |
Discussion | In British Columbia, Micranthes hieraciifolia is disjunct between the far north and the Okanagan-Thompson Plateau in the south (S. A. Harris 2003). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 68. | FNA vol. 8, p. 66. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga texana | Saxifraga hieraciifolia, Saxifraga hieraciifolia var. angusticapsula, Saxifraga hieraciifolia var. rufopilosa |
Name authority | (Buckley) Small: Fl. S.E. U.S., 501. 1903 , | (Waldstein & Kitaibel ex Willdenow) Haworth: Saxifrag. Enum., 45. 1821 (as hieracifolia) , |
Web links |