Micranthes marshallii |
Micranthes micranthidifolia |
|
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Idaho saxifrage, Marshall's saxifrage |
branch-lettuce, lettuceleaf saxifrage |
|
Habit | Plants in groups or sometimes mat-forming, rhizomatous. | Plants solitary or in groups, with bulbils on caudices. |
Leaves | 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. |
basal; petiole ± indistinct, (broad), flattened, 3–15 cm; blade lanceolate to oblanceolate, 4–35 cm, thin, base attenuate, margins irregularly serrate to dentate, ciliate, surfaces sparsely hairy. |
Inflorescences | 15–50+-flowered, open, lax thyrses, 20–40 cm, purple-tipped stipitate-glandular. |
(30–)50+–flowered, very open, lax thyrses, 30–75 cm, pink- to purplish-tipped stipitate-glandular; (bracts gradually smaller distally). |
Flowers | 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). |
sepals strongly reflexed, oblong; petals white, with 2 basal yellow spots that sometimes appear as 1 (sometimes faded in dried material), ± elliptic to spatulate, clawed, 2–3 mm, longer than sepals; filaments strongly club-shaped; pistils distinct almost to base; ovary superior, (to 1/3 adnate to hypanthium). |
Capsules | greenish to reddish purple, folliclelike. |
green, sometimes purplish, folliclelike. |
2n | = 20. |
= 22. |
Micranthes marshallii |
Micranthes micranthidifolia |
|
Phenology | Flowering spring. | Flowering spring. |
Habitat | Deeply shaded watercourses, stream banks, seeps | Rocky seepage slopes, stream banks |
Elevation | 100-1000 m (300-3300 ft) | 400-2100 m (1300-6900 ft) |
Distribution |
CA; OR
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GA; KY; MD; NC; PA; SC; VA; WV
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Discussion | Micranthes micranthidifolia was formerly gathered by local people in the southern Appalachians as a spring “green” (hence the common name, “branch” being dialect for a small stream); it is still occasionally seen in local grocery stores. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 8, p. 63. | FNA vol. 8, p. 60. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga marshallii | Robertsonia micranthidifolia, Aulaxis micranthidifolia, Saxifraga micranthidifolia |
Name authority | (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 145. 1905 , | (Haworth) Small: Fl. S.E. U.S., 501, 1331. 1903 , |
Web links |