Flora of North America species comparison

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Heuchera micrantha var. micrantha
Photo is of parent taxon

crevice alumroot, small-flower alumroot
Leaves

petiole glabrous or long stipitate-glandular;

blade orbiculate to pentagonal, shallowly lobed.
Inflorescences

glabrous or sparsely short to medium stipitate-glandular.
Flowers

hypanthium obconic, 1.4–4.5 × 1–3.7 mm, short to long stipitate-glandular;

sepals 0.6–1.2 mm, apex rounded to acute;

petals 0.2–0.7 mm wide;

styles 1.6–3.1 mm.
2n

= 28.

Heuchera micrantha var. micrantha
Phenology Flowering May–Jun.
Habitat Evergreen coniferous forests on basalt, schistose shale, metavolcanic, ultra basic, or serpentine-derived soils
Elevation 10-1900 m (0-6200 ft)
Distribution
from FNA
CA; ID; OR; WA
[BONAP county map]
Discussion

Variety micrantha occurs in the Coast Range, Cascade Range, Blue and Klamath mountains, northern Sierra Nevada, and the Columbia River gorge, and on wooded banks of the Columbia and its tributaries.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 91.
Parent taxa Saxifragaceae > Heuchera > Heuchera micrantha
Sibling taxa
H. micrantha var. diversifolia, H. micrantha var. erubescens, H. micrantha var. hartwegii, H. micrantha var. macropetala
Name authority unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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