Heuchera hirsutissima
Heuchera parvifolia
shaggyhair alum-root
common alum-root, littleleaf alum-root
10–40 cm, short stipitate-glandular and sparsely long stipitate-glandular.
4–71 cm, short stipitate-glandular.
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 glabrate or short stipitate-glandular;
blade orbiculate or reniform to broadly cordate, shallowly to deeply 5–7-lobed, 1–8 cm, base cordate, lobes rounded, margins dentate, apex obtuse, surfaces (glaucous), glabrate or short stipitate-glandular, sometimes long stipitate-glandular along veins abaxially, glabrate or short stipitate-glandular adaxially.
dense at anthesis, diffuse in fruit.
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 radially symmetric, free 0.4–1 mm, greenish or cream to yellow, flat, saucer-shaped, 2.5–5 mm, short stipitate-glandular and sometimes sparsely long stipitate-glandular;
sepals reflexed, green- or red-tipped, equal, 0.5–1.5 mm, apex acute;
petals reflexed, white, elliptic or rhombic, (clawed), unlobed, 0.7–3 mm, margins entire;
nectary tissue or disc encircling base of styles at junction of ovary and free hypanthium yellow or orange, exposed;
stamens included 0.5 mm, (incurved over stigmas);
styles included 1–1.5 mm, 0.3–0.5 mm, 0.1+ mm diam.
ovoid, 3 mm, beaks divergent, not papillose.
ovoid or subglobose, 3–6 mm, beaks divergent, not papillose.
dark brown, ellipsoid, ca. 0.7 mm.
dark brown, ovoid-ellipsoid, 0.6–1 mm.
dense.
= 14.
= 14, 28.
Heuchera hirsutissima
Heuchera parvifolia
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.)
The specific epithet, parvifolia, is similar to that of another species, Heuchera parviflora, but these two species are distinct and have legitimate names. C. O. Rosendahl et al. (1936) recognized five species and eight varieties in the H. parvifolia complex, based on differences in development of the nectary disc, shapes of the hypanthium, disc, and petals, width of the leaves, lengths of the peduncle and flowers, type of indument of the petiole and peduncle, height of the inflorescence, and degree of lobing of the leaves. Some of their varieties intergrade completely. As P. K. Holmgren and N. H. Holmgren (1997) observed, expressions of some of these characters vary with the stage of development of the plant, and there seems to be no correlation of morphology with geographical distribution. Accordingly, we do not recognize infraspecific taxa in this polymorphic species.
The Blackfoot Indians used pounded, wet roots of Heuchera parvifolia for rheumatism and sores, and an infusion of the roots as an eyewash. They applied a poultice of chewed roots to wounds and sores, as a styptic, and to cold sores and children’s mouth cankers. The Navajo used the plant as a panacea or “life medicine” and for rat bites. They took a decoction of the roots for stomachaches and to ease the delivery of the placenta, and an infusion of the roots as a lotion for venereal disease (D. E. Moerman 1998).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
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USDA Plants Database
PNW Herbaria
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