Micranthes foliolosa |
Micranthes oregana |
|
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leafy stem saxifrage, naked-bulbil small-flower-saxifrage, saxifrage à bulbilles |
bog saxifrage, Oregon or bogsaxifrage, Oregon saxifrage |
|
Habit | Plants solitary or tufted, with bulbils on caudices. | Plants solitary or in clusters, with caudex or thick, fleshy rhizomes. |
Leaves | basal; petiole ± absent; blade oblanceolate, 6–15(–30) cm, ± fleshy, base cuneate, margins subentire, sometimes 1–3-toothed distally, eciliate or sparsely ciliate, surfaces glabrate. |
basal; petiole indistinct, flattened, 3–10 cm; blade linear to oblanceolate, 6–25 cm, fleshy, base cuneate, margins serrulate to denticulate, ciliate, surfaces glabrous or sparsely hairy. |
Inflorescences | 2(–5+)-flowered, (proximal flowers replaced by bulbils), narrow, branched, sometimes ± open, cylindric thyrses, sometimes solitary flowers, 5–15 cm, glabrous or sparsely purple-tipped stipitate-glandular. (Pedicels erect to ascending.) Flowers: sepals reflexed, lanceolate; petals white, each with 1–2 basal yellow spots, lanceolate, clawed, 3–8 mm, longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior, (to 1/3 adnate to hypanthium). |
(30–)50+-flowered, open to ± crowded, conic to cylindric thyrses, 25–125 cm, hairy proximally, yellow- to pink-tipped stipitate-glandular distally. |
Flowers | sepals reflexed, ovate to triangular; petals white, not spotted, broadly elliptic to obovate and 2 times as long as sepals, sometimes oblanceolate and equaling or shorter than sepals, clawed, 2–5 mm; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior, often appearing superior in fruit. |
|
Capsules | green to purplish, valvate. |
green to reddish purple, folliclelike. |
2n | = 56. |
= 38, 76. |
Micranthes foliolosa |
Micranthes oregana |
|
Phenology | Flowering late summer. | Flowering early spring–summer. |
Habitat | Mossy tundra near streams and flushes, wet, rocky slopes, snowbeds | Bogs, marshes |
Elevation | 0-1800 m (0-5900 ft) | 100-2500 m (300-8200 ft) |
Distribution |
AK; CO; ME; NL; NT; NU; QC; YT; Greenland; n Europe; n Asia |
CA; CO; ID; MT; NV; OR; WA; AB
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Discussion | In both habitat and morphology, Micranthes oregana is similar to M. pensylvanica. A thorough investigation of the two species, especially the populations in Colorado that are disjunct from those in Montana, is needed to clarify relationships. The name Saxifraga integrifolia was misapplied to M. oregana by early California authors. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 57. | FNA vol. 8, p. 67. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga foliolosa, Saxifraga foliolosa var. multiflora, Saxifraga stellaris subsp. comosa, Saxifraga stellaris var. comosa | Saxifraga oregana, Saxifraga montanensis, Saxifraga oregana var. montanensis |
Name authority | (R. Brown) Gornall: J. Bot. Res. Inst. Texas 1: 1020. 2007 , | (Howell) Small: in N. L. Britton et al., N. Amer. Fl. 22: 138. 1905 , |
Web links |