Micranthes apetala |
Micranthes marshallii |
|
---|---|---|
tiny swamp saxifrage, western swamp saxifrage |
Idaho saxifrage, Marshall's saxifrage |
|
Habit | Plants solitary or in clusters, with bulbils on caudices, or short-rhizomatous. | Plants in groups or sometimes mat-forming, rhizomatous. |
Leaves | basal; petiole flattened, 0.5–3 cm; blade ± ovate, 2–5 cm, ± fleshy, base attenuate, margins entire or crenulate, eciliate, surfaces hairy. |
basal; petiole flattened, 3–15 cm; blade ovate, 1–5 cm, ± fleshy, base attenuate, margins shallowly crenate-serrate (teeth ca. 2 mm), eciliate, surfaces sparsely tangled, reddish brown-hairy abaxially, glabrate adaxially. |
Inflorescences | 10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
15–50+-flowered, open, lax thyrses, 20–40 cm, purple-tipped stipitate-glandular. |
Flowers | sepals erect to ascending, ovate; petals absent, sometimes 1–5, white to greenish white, not spotted, linear to oblong, clawed, 1–2 mm, much shorter than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior. |
sepals reflexed, lanceolate to oblong; petals white, with 2 basal yellow spots (often faded when dried), ovate, clawed, 1.5–4.5 mm, longer than sepals; filaments strongly club-shaped, sometimes petaloid (short-clawed, equaling petals); pistils distinct almost to base; ovary superior, (to 1/3 adnate to hypanthium). |
Capsules | reddish or purplish, folliclelike. |
greenish to reddish purple, folliclelike. |
2n | = 38. |
= 20. |
Micranthes apetala |
Micranthes marshallii |
|
Phenology | Flowering early spring–summer. | Flowering spring. |
Habitat | Vernally moist meadows, wet depressions on mountain slopes | Deeply shaded watercourses, stream banks, seeps |
Elevation | 600-2800 m (2000-9200 ft) | 100-1000 m (300-3300 ft) |
Distribution |
ID; MT; OR; WA
|
CA; OR
|
Source | FNA vol. 8, p. 68. | FNA vol. 8, p. 63. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga apetala, Saxifraga integrifolia var. apetala | Saxifraga marshallii |
Name authority | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , | (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 145. 1905 , |
Web links |
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