Micranthes eriophora |
Micranthes subapetala |
|
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redfuzz saxifrage |
Yellowstone saxifrage |
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Habit | Plants solitary or in groups, with bulbils on caudices. | Plants solitary or in clumps, with bulbils on caudices. |
Leaves | basal; petiole flattened, 0.5–2.5 cm; blade ovate to elliptic, 1–2 cm, ± fleshy, base attenuate, margins sharply serrate, sparsely to densely ciliate (some glandular-tipped), surfaces densely tangled, reddish brown-hairy abaxially, glabrous adaxially. |
basal; petiole usually indistinct, flattened, ca. 2 cm; blade ovate or elliptic to oblanceolate, 3–15 cm, fleshy, base cuneate, margins entire or minutely denticulate, ciliate, surfaces hairy. |
Inflorescences | 10+-flowered, (flowers often secund), very open, lax, often flat-topped thyrses with distant lateral branches, 6–25 cm, pink- to purplish-tipped stipitate-glandular. |
30+-flowered, ± constricted (spikelike) to ± open thyrses, 20–75 cm, yellow- to pink- (rarely purplish-) tipped stipitate-glandular. |
Flowers | sepals erect, triangular; petals white, sometimes purplish-tipped, not spotted, obovate to elliptic, not clawed or barely clawed, 4–7 mm, ca. 2 times as long as sepals; filaments linear, flattened; pistils distinct almost to base; ovary 1/3–1/2 inferior. |
sepals reflexed, ovate; petals absent, sometimes 1–5, pink to purplish, not spotted, elliptic, clawed, 1–2 mm, shorter than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary inferior. |
Capsules | purplish, valvate. |
dark purple, valvate. |
2n | = 76. |
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Micranthes eriophora |
Micranthes subapetala |
|
Phenology | Flowering late winter–early summer. | Flowering summer. |
Habitat | Rocky slopes and ledges | Subalpine and alpine meadows, wet banks, ledges |
Elevation | 1900-3000 m (6200-9800 ft) | 1200-3000 m (3900-9800 ft) |
Distribution |
AZ; NM; Mexico (Baja California, Chihuahua)
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ID; MT; WY
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Discussion | Although the species is usually distinctive, some populations of Micranthes subapetala in northern Wyoming appear more similar to M. hieraciifolia than to typical M. subapetala and may need to be re-evaluated. The distributional disjunction between the two taxa is about 1600 kilometers. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 64. | FNA vol. 8, p. 66. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga eriophora | Saxifraga subapetala, Saxifraga oregana var. subapetala, Saxifraga rydbergii |
Name authority | (S. Watson) Small: in N. L. Britton et al., N. Amer. Fl. 22: 142. (1905) | (E. E. Nelson) Small: in N. L. Britton et al., N. Amer. Fl. 22: 139. 1905 , |
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