Heuchera hirsutissima |
Heuchera alba |
|
---|---|---|
shaggyhair alum-root |
white alumroot |
|
Habit | Herbs acaulescent; caudex branched. | Herbs acaulescent; caudex branched. |
Flowering stems | 10–40 cm, short stipitate-glandular and sparsely long stipitate-glandular. |
often leafy, 26–77 cm, short stipitate-glandular. |
Leaves | petiole long stipitate-glandular; blade orbiculate to reniform, shallowly 5-lobed, 1–1.5 cm, base cordate, lobes rounded, margins dentate, apex obtuse, surfaces 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 0.8 mm on abaxial side, 1.8 mm on adaxial side, pink, narrowly cylindric, 5–6.5 mm, short stipitate-glandular proximally, densely long stipitate-glandular distally; sepals spreading, green- and red-tipped, unequal, 0.5–1.5 mm on abaxial side of hypanthium, to 0.5 mm on adaxial side, apex rounded; petals spreading, white, oblanceolate, (clawed), unlobed, 2–2.5 mm (equaling or longer than sepals, rarely shorter), margins entire; stamens exserted to 0.5 mm; styles included to 0.5 mm, 1.5 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, 3 mm, beaks divergent, not papillose. |
ovoid, 9–10 mm, beaks divergent, not papillose. |
Seeds | dark brown, ellipsoid, ca. 0.7 mm. |
dark brown, ellipsoid, 0.6–1 mm. |
Inflorescenses | dense. |
|
2n | = 14. |
|
Heuchera hirsutissima |
Heuchera alba |
|
Phenology | Flowering Jul–Aug. | Flowering May–Jun. |
Habitat | Fir and subalpine forest | Shaded or exposed sandstone rock outcroppings, ridges, and peaks |
Elevation | 2100-3500 m (6900-11500 ft) | 1300-1500 m (4300-4900 ft) |
Distribution |
CA
|
VA; WV |
Discussion | Of conservation concern. Heuchera hirsutissima is known from Mount San Jacinto and the San Jacinto Mountains of Riverside County and possibly the San Bernardino Mountains of San Bernardino County. It resembles H. caespitosa and H. elegans, except for its densely villous hypanthium and minute adaxial sepals. (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. 99. | FNA vol. 8, p. 96. |
Parent taxa | Saxifragaceae > Heuchera | Saxifragaceae > Heuchera |
Sibling taxa | ||
Name authority | Rosendahl: Minnesota Stud. Pl. Sci. 2: 110. (1936) | Rydberg: Torreya 26: 31, plate 2. (1926) |
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