Micranthes integrifolia |
Micranthes hitchcockiana |
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Columbian saxifrage, grassland saxifrage, northwestern saxifrage, smooth leaf saxifrage, swamp saxifrage, whole-leaf saxifrage |
Hitchcock's saxifrage, Saddle Mountain saxifrage |
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Habit | Plants solitary or in clumps, (sometimes gynodioecious), often with bulbils on caudices, or short-rhizomatous. | Plants solitary or in clumps, short-rhizomatous. |
Leaves | basal; petiole flattened, 0.5–4 cm; blade narrowly to broadly ovate, 2–7 cm, ± leathery, base attenuate, margins entire or minutely denticulate, usually ciliate, surfaces sparsely to moderately 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 | (15–)20+-flowered, open to ± congested, conic thyrses, (usually branched, lateral cymules ± open), 12–35 cm, densely pink- to purple-tipped stipitate-glandular. |
70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-tipped stipitate-glandular. |
Flowers | sepals spreading to slightly reflexed, ovate; petals white, not spotted, obovate, clawed, 2–4 mm, longer than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior. |
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 | reddish or purplish, folliclelike. |
greenish to reddish purple, folliclelike. |
2n | = 38. |
= 76. |
Micranthes integrifolia |
Micranthes hitchcockiana |
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Phenology | Flowering late winter–spring. | Flowering late spring–summer. |
Habitat | Vernally moist meadows, grassy slopes, rock outcrops | Wet rocks and ledges on mountain-top balds |
Elevation | 0-1800 m (0-5900 ft) | 600-1100 m (2000-3600 ft) |
Distribution |
CA; OR; WA; BC
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OR
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Discussion | The occasional occurrence of sterile pollen has been noted in this as well as in other species of Micranthes (as Saxifraga, K. I. Beamish 1961). Some populations exhibit gynodioecism (P. E. Elvander 1982). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. 67. | FNA vol. 8, p. 70. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga integrifolia | Saxifraga hitchcockiana |
Name authority | (Hooker) Small: in N. L. Britton et al., N. Amer. Fl. 22: 137. 1905 , | (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , |
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