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Abrams' alumroot, San Gabriel alum-root

bract alumroot, Rocky Mountain alumroot

Habit Herbs subcaulescent; caudex branched. Herbs usually subcaulescent; caudex branched or unbranched.
Flowering stems

6–15 cm, short stipitate-glandular.

leafy, 6–28(–38) cm, short stipitate-glandular.

Leaves

petiole glabrous or short stipitate-glandular and scattered medium stipitate-glandular;

blade ovate, deeply 5-lobed, 0.5–2 cm, base truncate or shallowly cordate, lobes rounded, margins dentate, apex obtuse, surfaces short stipitate-glandular abaxially, sparsely long stipitate-glandular adaxially.

petiole short to medium stipitate-glandular;

blade reniform or broadly ovate, shallowly 5–7-lobed, 1.5–4 cm, base subcordate or truncate, lobes rounded, margins sharply dentate, apex often mucronate, surfaces short stipitate-glandular or sparsely long stipitate-glandular abaxially, short stipitate-glandular adaxially.

Inflorescences

dense.

dense, (secund).

Flowers

hypanthium strongly bilaterally symmetric, free 1.5–2 mm on adaxial side, reddish purple, cylindric, 4–5 mm, short stipitate-glandular proximally, medium stipitate-glandular distally;

sepals spreading, green-tipped, unequal, 1.2–1.5 mm, apex obtuse or rounded;

petals spreading, white, spatulate or oblanceolate, rarely linear, unlobed, 1.5–2.5 mm (equaling or longer than sepals), margins entire;

stamens barely included to 1.5 mm exserted;

styles exserted 1.5–2 mm, 2.5–3 mm, 0.1+ mm diam.

hypanthium weakly bilaterally symmetric, free 0.5–1.5 mm, greenish yellow, narrowly campanulate, 3–5 mm, short stipitate-glandular;

sepals erect, green-tipped, equal, 1–1.5 mm, apex rounded;

petals erect, green, oblanceolate, unlobed, 2 mm, margins entire;

stamens exserted 0.5–1 mm;

styles exserted 1 mm, 1.5–2 mm, 0.1+ mm diam.

Capsules

ovoid, 3.5–5 mm, beaks divergent, not papillose.

ovoid, 4–6 mm, beaks divergent, not papillose.

Seeds

dark brown, ellipsoid, 0.6 mm.

brownish black, nearly straight along 1 side, convex on other side, 0.7–0.8 mm.

Heuchera abramsii

Heuchera bracteata

Phenology Flowering Jul–Aug. Flowering May–Jul.
Habitat Rocky soil in red fir forest Shaded rocky ledges and outcrops
Elevation 2800-3100 m (9200-10200 ft) 1700-3500 m (5600-11500 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CO; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

Heuchera abramsii occurs in the San Antonio Mountains and the eastern part of the San Gabriel Mountains, San Bernardino and Los Angeles counties. It closely resembles H. brevistaminea, H. caespitosa, H. elegans, and H. pulchella.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Heuchera bracteata occurs in the Rocky Mountains and foothills of northern Colorado and southern Wyoming.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 8, p. 99. FNA vol. 8, p. 97.
Parent taxa Saxifragaceae > Heuchera Saxifragaceae > Heuchera
Sibling taxa
H. alba, H. americana, H. bracteata, H. brevistaminea, H. caespitosa, H. caroliniana, H. chlorantha, H. cylindrica, H. eastwoodiae, H. elegans, H. glabra, H. glomerulata, H. grossulariifolia, H. hallii, H. hirsutissima, H. longiflora, H. maxima, H. merriamii, H. micrantha, H. novamexicana, H. parishii, H. parviflora, H. parvifolia, H. pilosissima, H. pubescens, H. pulchella, H. richardsonii, H. rubescens, H. sanguinea, H. villosa, H. wootonii
H. abramsii, H. alba, H. americana, H. brevistaminea, H. caespitosa, H. caroliniana, H. chlorantha, H. cylindrica, H. eastwoodiae, H. elegans, H. glabra, H. glomerulata, H. grossulariifolia, H. hallii, H. hirsutissima, H. longiflora, H. maxima, H. merriamii, H. micrantha, H. novamexicana, H. parishii, H. parviflora, H. parvifolia, H. pilosissima, H. pubescens, H. pulchella, H. richardsonii, H. rubescens, H. sanguinea, H. villosa, H. wootonii
Synonyms Tiarella bracteata
Name authority Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 109. 1905 , (Torrey) Seringe: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 4: 52. 1830 ,
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