Flora of North America species comparison

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Heuchera micrantha var. hartwegii

Heuchera micrantha var. erubescens
Photo is of parent taxon

Hartweg's alumroot, Hartweg's small-flower alumroot
Photo is of parent taxon

crevice alumroot
Leaves

petiole short stipitate-glandular mixed with long stipitate-glandular;

blade pentagonal or heptagonal, deeply lobed.

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

blade pentagonal or heptagonal, deeply lobed.
Inflorescences

long stipitate-glandular.

short stipitate-glandular.
Flowers

hypanthium broadly turbinate, 1.5–4.7 × 1.5–3.8 mm, long stipitate-glandular;

sepals 0.5–1.3 mm, apex rounded to acute;

petals 0.3–0.7 mm wide;

styles 1.8–4.2 mm.

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.
2n

= 14, 28.

= 14.

Heuchera micrantha var. hartwegii

Heuchera micrantha var. erubescens
Phenology Flowering Apr–Jul. Flowering Jun–Jul.
Habitat Redwood or pine forest over sandstone, granite, or serpentine soils Mixed evergreen forest on limestone, mica schist, granite, or serpentine soils
Elevation 0-1600 m (0-5200 ft) 100-2200 m (300-7200 ft)
Distribution
from FNA
CA; OR; WA
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Variety hartwegii occurs in the Coast Ranges.

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

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