Heuchera sanguinea |
Heuchera alba |
|
---|---|---|
coralbells |
white alumroot |
|
Habit | Herbs acaulescent; caudex branched. | Herbs acaulescent; caudex branched. |
Flowering stems | 20–40 cm, short and sometimes long stipitate-glandular. |
often leafy, 26–77 cm, short stipitate-glandular. |
Leaves | petiole long stipitate-glandular; blade reniform to orbiculate, shallowly 5–7-lobed, 2–5.5 cm, base cordate, lobes rounded, margins dentate, apex acute to obtuse, surfaces long stipitate-glandular on veins abaxially, glabrous or sparsely long stipitate-glandular adaxially. |
petiole glabrous or short stipitate-glandular; blade broadly ovate to cordate, shallowly 5-lobed, 4.5–9 cm, base cordate or nearly truncate, lobes rounded to widely ovate, margins dentate, apex acute or obtuse, surfaces glabrous or sparsely stipitate-glandular, at least on veins. |
Inflorescences | moderately dense to diffuse. |
diffuse. |
Flowers | hypanthium weakly bilaterally to radially symmetric, free 2.5–2.8 mm, dark pink to red, broadly campanulate or urceolate, 4–8 mm, short stipitate-glandular proximally, sparsely long stipitate-glandular distally; sepals spreading, darker red-tipped, equal, 2–3 mm, apex oblong or rounded; petals spreading, pink or cream, narrowly oblanceolate, unlobed, 1.2–1.8 mm (shorter than sepals), margins entire; stamens included 1.5–3 mm; styles included 1.5–3 mm, 1.5–2 mm, 0.1+ mm diam. |
hypanthium moderately bilaterally symmetric, free 3.5–4.5 mm, green, campanulate, abruptly inflated distal to adnation to ovary, 7.5–11 mm, short stipitate-glandular; sepals spreading, green-tipped, equal, 3–4 mm, apex rounded (sinuses narrower than petals); petals inflexed, white, broadly spatulate, unlobed, 2.8–3.5 mm, margins fimbriate; stamens 2 mm included to 2 mm exserted; styles included 0.5–1 mm, 4–6 mm, to 0.1 mm diam. |
Capsules | ovoid, 4.5–6 mm, beaks divergent, not papillose. |
ovoid, 9–10 mm, beaks divergent, not papillose. |
Seeds | dark brown, ellipsoid, 0.5–0.6 mm, bluntly spiny. |
dark brown, ellipsoid, 0.6–1 mm. |
Heuchera sanguinea |
Heuchera alba |
|
Phenology | Flowering Mar–Oct. | Flowering May–Jun. |
Habitat | Moist, shaded rocks | Shaded or exposed sandstone rock outcroppings, ridges, and peaks |
Elevation | 1200-2600 m (3900-8500 ft) | 1300-1500 m (4300-4900 ft) |
Distribution |
AZ; NM; Mexico (Chihuahua)
|
VA; WV |
Discussion | Heuchera sanguinea occurs in the southwestern United States and northern Chihuahua, Mexico, and is widely cultivated throughout the cooler parts of North America. Heuchera sanguinea varies considerably within populations in shape, lobing, and size of leaves, in amount of hairs, and in shape, form, and color of flowers. Rydberg recognized var. pulchra as characterized by denser inflorescences and longer hairs on its pedicels, inferior part of the ovary, and sepals. Mixed populations with individuals bearing longer and shorter hairs can be found throughout the range of the species, especially in Arizona. It seems best to recognize H. sanguinea as a variable species without infraspecific taxa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Heuchera alba occurs on sandstone ridges in the Ridge and Valley Province. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 100. | FNA vol. 8, p. 96. |
Parent taxa | Saxifragaceae > Heuchera | Saxifragaceae > Heuchera |
Sibling taxa | ||
Synonyms | H. sanguinea var. pulchra | |
Name authority | Engelmann: in F. A. Wislizenus, Mem. Tour N. Mexico, 107. 1848 , | Rydberg: Torreya 26: 31, plate 2. (1926) |
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