Micranthes bryophora |
Micranthes nivalis |
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bud saxifrage |
alpine saxifrage, saxifrage des neiges, snow saxifrage |
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Habit | Plants solitary or tufted, with bulbils on caudices. | Plants tufted, with bulbils on caudices. |
Leaves | ± basal; petiole absent; blade linear to narrowly elliptic, 0.5–4 cm, fleshy, base cuneate, margins subentire, ciliate, surfaces hirsute. |
basal; petiole flattened, (0.4–)1–4 cm; blade ovate to ± round, sometimes elliptic or oblong, (0.5–)1–4 cm, thick, coriaceous, base attenuate to ± truncate, margins serrate to dentate on distal 2/3 (sometimes more), proximally ciliate, surfaces ± densely tangled, reddish brown-hairy abaxially, glabrous or glabrate adaxially. |
Inflorescences | usually 2–3+-flowered, open, lax thyrses, sometimes solitary flowers, (flowers terminal, proximal usually replaced by bulbils, sometimes bulbils absent), 2–25 cm, stipitate-glandular. (Pedicels reflexed.) Flowers: sepals reflexed, elliptic; petals white, each with 2 basal yellow spots, triangular to broadly ovate, clawed, 3–5 mm, longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior, (to 1/3 adnate to hypanthium). |
(5–)10–40-flowered, congested, almost capitate thyrses, (3–)7–20 cm, ± densely purple-tipped stipitate-glandular. |
Flowers | sepals erect, spreading in fruit, ovate to deltate; petals white, sometimes pink tinged, not spotted, oblong to ovate, clawed, 2–4 mm, ± equaling sepals; filaments linear, flattened; pistils connate ca. 1/2 their lengths; ovary 1/2 inferior, appearing more superior in fruit. |
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Capsules | green to yellow, purple tinged, valvate. |
green, becoming reddish to purplish, folliclelike. |
2n | = 60. |
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Micranthes bryophora |
Micranthes nivalis |
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Phenology | Flowering summer. | Flowering summer. |
Habitat | Wet meadows, rocky ledges | Open, mossy tundra, rocky ridges, or shady ledges |
Elevation | 1600-4500 m (5200-14800 ft) | 0-1500 m (0-4900 ft) |
Distribution |
CA; ID
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AK; AB; BC; LB; NT; NU; QC; YT; Greenland; Europe; Asia (Himalayas, Kamchatka, Siberia) |
Discussion | Specimens of Micranthes bryophora from the disjunct populations in Idaho have been called Saxifraga bryophora var. tobiasiae; they appear to overlap in morphology with the California plants and are not distinguished here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Micranthes nivalis is closely related to M. tenuis. All records of M. nivalis in the United States (except Alaska) appear to be misapplied to or misidentifications of M. aprica, M. occidentalis, or M. rhomboidea. Occasional, dwarfed specimens of M. hieraciifolia and M. subapetala are similarly mislabelled. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 58. | FNA vol. 8, p. 64. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga bryophora, Saxifraga bryophora var. tobiasiae | Saxifraga nivalis |
Name authority | (A. Gray) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1020. (2007) | (Linnaeus) Small: in N. L. Britton et al., N. Amer. Fl. 22: 136. 1905 , |
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