Micranthes hitchcockiana |
Micranthes texana |
|
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Hitchcock's saxifrage, Saddle Mountain saxifrage |
Texas saxifrage |
|
Habit | Plants solitary or in clumps, short-rhizomatous. | Plants solitary or in clumps, with bulbils on caudices. |
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, 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. |
Inflorescences | 70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-tipped stipitate-glandular. |
20+-flowered, branched, ± capitate thyrses, 10–15 cm, hairy, sometimes purple-tipped stipitate-glandular. |
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 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. |
Capsules | greenish to reddish purple, folliclelike. |
reddish to purplish, valvate. |
2n | = 76. |
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Micranthes hitchcockiana |
Micranthes texana |
|
Phenology | Flowering late spring–summer. | Flowering late winter–spring. |
Habitat | Wet rocks and ledges on mountain-top balds | Sandy flats, rocky, open, wooded areas, granite outcrops |
Elevation | 600-1100 m (2000-3600 ft) | 50-500 m (200-1600 ft) |
Distribution |
OR
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AR; GA; KS; LA; MO; OK; TX |
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.) |
|
Source | FNA vol. 8, p. 70. | FNA vol. 8, p. 68. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga hitchcockiana | Saxifraga texana |
Name authority | (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , | (Buckley) Small: Fl. S.E. U.S., 501. 1903 , |
Web links |
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