Micranthes lyallii
Micranthes hitchcockiana
Lyall's saxifrage, red-stem saxifrage
Hitchcock's saxifrage, Saddle Mountain saxifrage
basal;
petiole rounded to flattened, 2–10 cm;
blade spatulate to obovate, 0.8–8 cm, thin, base cuneate to slightly attenuate, margins serrate to dentate, eciliate or sparsely glandular-ciliate, surfaces abaxially glabrous, adaxially sparsely brown-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.
usually 10–15-flowered, lax, cylindric thyrses, (red), (4–)7–30 cm, sparsely purple-tipped stipitate-glandular.
70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-tipped stipitate-glandular.
sepals reflexed, oblong to elliptic;
petals white, each with 2 basal yellowish green spots, elliptic to round, clawed, 2–5.5 mm, longer than sepals;
filaments club-shaped, (to 6 mm);
pistils connate 1/2+ their lengths;
ovary superior, (to 1/3 adnate to hypanthium).
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.
green to yellow, distal 1/2 purple, ± folliclelike, (basally connate).
greenish to reddish purple, folliclelike.
= ca. 56, 58.
= 76.
Micranthes lyallii
Micranthes hitchcockiana
Although they have nearly disjunct sets of populations, the subspecies of Micranthes lyallii are difficult to distinguish from each other. The more northern plants tend to be larger with wider leaves and often have been called Saxifraga lyallii subsp. or var. hultenii. Apparent hybrids with M. odontoloma occur in Alberta, British Columbia, and northern Idaho, and near Glacier National Park, Montana.
(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.)
BC
WA
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