Flora of North America species comparison

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Heuchera micrantha var. erubescens

Heuchera micrantha var. micrantha
Photo is of parent taxon

crevice alumroot
Photo is of parent taxon

crevice alumroot, small-flower alumroot
Leaves

petiole short stipitate-glandular or sparsely long stipitate-glandular;

blade pentagonal or heptagonal, deeply lobed.

petiole glabrous or long stipitate-glandular;

blade orbiculate to pentagonal, shallowly lobed.
Inflorescences

short stipitate-glandular.

glabrous or sparsely short to medium stipitate-glandular.
Flowers

hypanthium obconic, 1.7–3.1 × 1–2.3 mm (1.4 times longer than wide), short stipitate-glandular;

sepals 0.5–1.8 mm, apex acute;

petals 0.2–0.6 mm wide;

styles 0.2–0.6 mm.

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

= 14.

= 28.

Heuchera micrantha var. erubescens

Heuchera micrantha var. micrantha
Phenology Flowering Jun–Jul. Flowering May–Jun.
Habitat Mixed evergreen forest on limestone, mica schist, granite, or serpentine soils Evergreen coniferous forests on basalt, schistose shale, metavolcanic, ultra basic, or serpentine-derived soils
Elevation 100-2200 m (300-7200 ft) 10-1900 m (0-6200 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA; ID; OR; WA
[BONAP county map]
Discussion

Variety erubescens occurs in the Klamath Mountains, middle Sierra Nevada, and Diablo and Santa Lucia mountains.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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. 92. FNA vol. 8, p. 91.
Parent taxa Saxifragaceae > Heuchera > Heuchera micrantha Saxifragaceae > Heuchera > Heuchera micrantha
Sibling taxa
H. micrantha var. diversifolia, H. micrantha var. hartwegii, H. micrantha var. macropetala, H. micrantha var. micrantha
H. micrantha var. diversifolia, H. micrantha var. erubescens, H. micrantha var. hartwegii, H. micrantha var. macropetala
Synonyms H. erubescens
Name authority (A. Braun & C. D. Bouché) Rosendahl: Bot. Jahrb. Syst. 37(2, Beibl. 83): 77. (1905) 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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