Heuchera elegans |
Heuchera alba |
|
---|---|---|
urn-flower alum-root |
white alumroot |
|
Habit | Herbs subcaulescent; caudex branched. | Herbs acaulescent; caudex branched. |
Flowering stems | 10–40 cm, sparsely medium stipitate-glandular. |
often leafy, 26–77 cm, short stipitate-glandular. |
Leaves | petiole long stipitate-glandular; blade reniform or orbiculate, shallowly 5-lobed, 1.5–3.5 cm, base cordate or truncate, lobes rounded, margins dentate, apex obtuse, surfaces short or long stipitate-glandular. |
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 | diffuse. |
|
Flowers | hypanthium strongly bilaterally symmetric, free 3–3.5 mm on adaxial side, pink to purplish, narrowly cylindric or cylindric-urceolate, 4–7 mm, short stipitate-glandular proximally, densely long stipitate-glandular distally; sepals spreading, green-tipped, unequal, 2 mm on adaxial side of hypanthium, apex obtuse or rounded; petals spreading, white, broadly oblanceolate, (clawed), unlobed, 3–4 mm (longer than sepals), margins entire; stamens included 0.5 mm to exserted 0.5 mm; styles included to 2 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 | urceolate, 4–6 mm, beaks divergent, not papillose. |
ovoid, 9–10 mm, beaks divergent, not papillose. |
Seeds | dark brown, ellipsoid, 0.7 mm. |
dark brown, ellipsoid, 0.6–1 mm. |
Inflorescenses | dense. |
|
Heuchera elegans |
Heuchera alba |
|
Phenology | Flowering May–Jun. | Flowering May–Jun. |
Habitat | Rocky sites in yellow pine and red fir forests | Shaded or exposed sandstone rock outcroppings, ridges, and peaks |
Elevation | 1500-2600 m (4900-8500 ft) | 1300-1500 m (4300-4900 ft) |
Distribution |
CA |
VA; WV |
Discussion | Heuchera elegans occurs in the mountains of southern California, chiefly in the San Gabriel Range in Los Angeles and San Bernardino counties and vicinity. It resembles H. caespitosa. This group is in need of phylogenetic study. (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 | ||
Sibling taxa | ||
Name authority | Abrams: Bull. S. Calif. Acad. Sci. 1: 67. 1902 , | Rydberg: Torreya 26: 31, plate 2. (1926) |
Web links |