Micranthes tolmiei

(Torrey & A. Gray) Brouillet & Gornall

J. Bot. Res. Inst. Texas 1: 1022. 2007 ,.

Common names: Tolmie’s or alpine saxifrage
Basionym: Saxifraga tolmiei Torrey & A. Gray Fl. N. Amer. 1: 567. 1840 (as tolmaei)
Synonyms: Saxifraga tolmiei var. ledifolia (Greene) Engler & Irmscher
Treatment appears in FNA Volume 8. Treatment on page 54. Mentioned on page 49, 50, 52.

Plants mat-forming, (stems trailing, thin, basally slightly woody), with slender, woody caudices. Leaves cauline, proximally crowded; petiole absent; blade elliptic-obovate, 0.8–1.5 cm, fleshy, base cuneate, margins entire, sometimes proximally sparsely long-ciliate, surfaces glabrous. Inflorescences 2–10-flowered, lax cymes, sometimes solitary flowers, 3–12 cm, glabrous or purplish- or pink-tipped stipitate-glandular; (bracts 1–3, proximal). Flowers: sepals erect to spreading, ovate; petals white, not spotted, linear to oblanceolate, 2.5–5 mm, longer than sepals, short- or not clawed; filaments broadly club-shaped (± petaloid); pistils connate to 1/2 their lengths; ovary ± superior (to 1/4 adnate to hypanthium). Capsules green, purple mottled, valvate. 2n = 30.


Phenology: Flowering summer.
Habitat: Arctic and alpine tundra, fell-fields
Elevation: 500-4000 m

Distribution

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B.C., Alaska, Calif., Idaho, Mont., Nev., Oreg., Utah, Wash.

Discussion

Unlike those of most Micranthes species, the leaves of M. tolmiei are proximally cauline and the ovules have two integuments. The seeds have a loose, winglike testa.

Selected References

None.

Lower Taxa

None.
... more about "Micranthes tolmiei"
Luc Brouillet +  and Patrick E. Elvander† +
(Torrey & A. Gray) Brouillet & Gornall +
Saxifraga tolmiei +
Tolmie’s or alpine saxifrage +
B.C. +, Alaska +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wash. +
500-4000 m +
Arctic and alpine tundra, fell-fields +
Flowering summer. +
J. Bot. Res. Inst. Texas +
Saxifraga tolmiei var. ledifolia +
Micranthes tolmiei +
Micranthes +
species +