Flora of North America species comparison

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Heuchera micrantha var. hartwegii

Heuchera micrantha var. diversifolia
Photo is of parent taxon

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

crevice alumroot, small-flower alumroot
Leaves

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

blade pentagonal or heptagonal, deeply lobed.

petiole short to long stipitate-glandular;

blade pentagonal or heptagonal, deeply lobed.
Inflorescences

long stipitate-glandular.

sparsely long 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 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.
2n

= 14, 28.

= 14, 28.

Heuchera micrantha var. hartwegii

Heuchera micrantha var. diversifolia
Phenology Flowering Apr–Jul. Flowering May–Jul.
Habitat Redwood or pine forest over sandstone, granite, or serpentine soils Mixed coniferous forest on talus, slate, serpentine, basalt, or granite base
Elevation 0-1600 m (0-5200 ft) 100-1900 m (300-6200 ft)
Distribution
from FNA
CA; OR; WA
[BONAP county map]
from FNA
CA; OR; WA; BC
[BONAP county map]
Discussion

Variety hartwegii occurs in the Coast Ranges.

(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.)
Source FNA vol. 8, p. 92. FNA vol. 8, p. 93.
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. erubescens, H. micrantha var. hartwegii, H. micrantha var. macropetala, H. micrantha var. micrantha
Synonyms H. pilosissima var. hartwegii, H. hartwegii H. diversifolia, H. micrantha var. pacifica
Name authority (S. Watson ex Wheelock) Rosendahl: Bot. Jahrb. Syst. 37(2, Beibl. 83): 77. (1905) (Rydberg) Rosendahl: Minnesota Stud. Pl. Sci. 2: 42. (1936)
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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