Micranthes hitchcockiana
Micranthes calycina
Micranthes reflexa
Hitchcock's saxifrage, Saddle Mountain saxifrage
Yukon saxifrage
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.
basal;
petiole ± distinct, flattened, (0.5–)1–3.5 cm;
blade rhombic or fan-shaped, sometimes nearly round, (1–)1.5–3.5 cm, ± fleshy, base attenuate to ± cuneate, margins 7–11-toothed in distal 1/2–2/3 (teeth 1–3 mm), sparsely ciliate, surfaces glabrous.
basal;
petiole broadly flattened, 1–2 cm;
blade elliptic to broadly ovate, 1–3 cm, fleshy, base attenuate, margins shallowly serrate (teeth to 1 mm), densely ciliate, surfaces tangled reddish brown-hairy.
70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-tipped stipitate-glandular.
3–15-flowered, usually racemiform, sometimes paniculiform thyrses, 3–15 cm, axis glabrous or sparsely long-hairy, branches ± densely (rarely sparsely) long tangled-hairy; (bracts reduced).
15+-flowered thyrses with flowers crowded at branch tips, 7–60 cm, ± hairy, also with some purple-tipped glandular hairs.
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.
sepals reflexed, lanceolate to ovate;
petals white to cream, sometimes purplish, not spotted, linear to narrowly elliptic, not clawed, 2–4 mm, longer than sepals;
filaments linear, flattened;
pistils connate 1/2+ their lengths, (conic);
ovary ± 1/2 inferior.
sepals reflexed, ovate to triangular;
petals white, with 2 basal yellow spots (spots distinct even in dried material), elliptic to spatulate, clawed, 2–4 mm, longer than sepals;
filaments strongly club-shaped, (longer than petals);
pistils distinct almost to base;
ovary superior, (to 1/3 adnate to hypanthium).
greenish to reddish purple, folliclelike.
purple-black, valvate.
green to purplish, folliclelike.
= 76.
= 24.
= 20, 40.
Micranthes hitchcockiana
Micranthes calycina
Micranthes reflexa
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.)
Micranthes calycina is found mostly in western Alaska, in the north from the Seward Peninsula to the Brooks Range west of Atigun Pass, and in the south from Unimak Island and the Ahklum Mountains to the Saint Elias Mountains. It is also present on the main Bering Sea islands, but apparently not on the Aleutians west of Unimak. Plants of this species sometimes have been misidentified as M. davurica (Willdenow) Small, a species restricted to eastern Siberia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Micranthes idahoensis, M. marshallii, and M. reflexa form a morphological complex of ecologically and geographically distinct entities in western North America that is much in need of study. The eastern North American M. careyana and M. caroliniana are also morphologically similar to the members of this complex.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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