Heuchera micrantha |
Heuchera micrantha var. diversifolia |
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alum root, crevice alum-root, small-flower alumroot |
crevice alumroot, small-flower alumroot |
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| Habit | Herbs caulescent; caudex branched. | |||||||||||||||||
| Flowering stems | 6–57 cm, short to long stipitate-glandular or glabrous, viscid. |
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| Leaves | petiole glabrous or sparsely to densely short to long stipitate-glandular; blade orbiculate to polygonal, shallowly to deeply 5–7(–9)-lobed, 2.5–10 cm, base cordate, lobes rounded, margins dentate, apex rounded or obtuse, surfaces glabrous or short to long stipitate-glandular, viscid. |
petiole short to long stipitate-glandular; blade pentagonal or heptagonal, deeply lobed. |
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| Inflorescences | diffuse. |
sparsely long stipitate-glandular. |
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| Flowers | hypanthium radially symmetric, free to 1.5 mm, greenish white, often tinged with red, obconic to hemispheric, broadly turbinate, or campanulate, 1–4.9 mm, long stipitate-glandular, sometimes short stipitate-glandular proximally; sepals spreading to nearly erect, green- or red-tipped, equal, 0.5–1.8 mm, apex rounded to acute or mucronate; petals often coiled, white or pale pink, oblanceolate, (narrowly clawed), unlobed, 1.6–3.3 mm (2–3 times as long as sepals), margins entire; stamens exserted to 3 mm; styles exserted to 2.5 mm, 0.2–4.2 mm, to 0.1 mm diam. |
hypanthium turbinate to campanulate, 1.5–4.9 × 1.2–3.4 mm, sparsely long stipitate-glandular; sepals 0.6–1.2 mm, apex acute to mucronate; petals 0.2–0.7 mm wide; styles 0.4–3.6 mm. |
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| Capsules | ovoid, 3–8.5 mm, beaks divergent, not papillose. |
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| Seeds | black, broadly ellipsoid, (not curved), 0.5–0.8 mm. |
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| 2n | = 14, 28. |
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Heuchera micrantha |
Heuchera micrantha var. diversifolia |
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| Phenology | Flowering May–Jul. | |||||||||||||||||
| Habitat | Mixed coniferous forest on talus, slate, serpentine, basalt, or granite base | |||||||||||||||||
| Elevation | 100-1900 m [300-6200 ft] | |||||||||||||||||
| Distribution |
CA; ID; OR; WA; BC
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CA; OR; WA; BC |
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| Discussion | Varieties 5 (5 in the flora). The Skagit Indians rubbed pounded plants of Heuchera micrantha on hair to make it grow and applied it to cuts. The Thompson Indians used a mashed poultice of this root mixed with Douglas fir pitch for wounds. Chewed leaves and roots were spat on sores or wounds. Infusions of roots were taken for liver trouble and sore throat. Small, peeled, cleaned root pieces were chewed for mouth sores and gum boils (D. E. Moerman 1998). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety diversifolia occurs in the Coast Ranges, Cascade Range, and Klamath and Santa Lucia mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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| Key |
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| Synonyms | H. diversifolia, H. micrantha var. pacifica | |||||||||||||||||
| Name authority | Douglas ex Lindley: Edwards’s Bot. Reg. 15: plate 1302. 1830 , | (Rydberg) Rosendahl: Minnesota Stud. Pl. Sci. 2: 42. (1936) | ||||||||||||||||
| Source | FNA vol. 8, p. 91. | FNA vol. 8, p. 93. | ||||||||||||||||
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