Micranthes subapetala |
Micranthes apetala |
|
---|---|---|
Yellowstone saxifrage |
tiny swamp saxifrage, western swamp saxifrage |
|
Habit | Plants solitary or in clumps, with bulbils on caudices. | Plants solitary or in clusters, with bulbils on caudices, or short-rhizomatous. |
Leaves | basal; petiole usually indistinct, flattened, ca. 2 cm; blade ovate or elliptic to oblanceolate, 3–15 cm, fleshy, base cuneate, margins entire or minutely denticulate, ciliate, surfaces hairy. |
basal; petiole flattened, 0.5–3 cm; blade ± ovate, 2–5 cm, ± fleshy, base attenuate, margins entire or crenulate, eciliate, surfaces hairy. |
Inflorescences | 30+-flowered, ± constricted (spikelike) to ± open thyrses, 20–75 cm, yellow- to pink- (rarely purplish-) tipped stipitate-glandular. |
10–25-flowered, congested, glomerate thyrses, 4–15 cm, pink- to purple-tipped stipitate-glandular (hairs uniseriate). |
Flowers | sepals reflexed, ovate; petals absent, sometimes 1–5, pink to purplish, not spotted, elliptic, clawed, 1–2 mm, shorter than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary inferior. |
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. |
Capsules | dark purple, valvate. |
reddish or purplish, folliclelike. |
2n | = 76. |
= 38. |
Micranthes subapetala |
Micranthes apetala |
|
Phenology | Flowering summer. | Flowering early spring–summer. |
Habitat | Subalpine and alpine meadows, wet banks, ledges | Vernally moist meadows, wet depressions on mountain slopes |
Elevation | 1200-3000 m (3900-9800 ft) | 600-2800 m (2000-9200 ft) |
Distribution |
ID; MT; WY
|
ID; MT; OR; WA
|
Discussion | Although the species is usually distinctive, some populations of Micranthes subapetala in northern Wyoming appear more similar to M. hieraciifolia than to typical M. subapetala and may need to be re-evaluated. The distributional disjunction between the two taxa is about 1600 kilometers. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 8, p. 66. | FNA vol. 8, p. 68. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga subapetala, Saxifraga oregana var. subapetala, Saxifraga rydbergii | Saxifraga apetala, Saxifraga integrifolia var. apetala |
Name authority | (E. E. Nelson) Small: in N. L. Britton et al., N. Amer. Fl. 22: 139. 1905 , | (Piper) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. 1905 , |
Web links |
|