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Abrams' alumroot, San Gabriel alum-root

green-flower alum-root, meadow, meadow alumroot, narrow-flower, tall, tall alumroot

Habit Herbs subcaulescent; caudex branched. Herbs acaulescent; caudex branched.
Flowering stems

6–15 cm, short stipitate-glandular.

40–110 cm, long 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 long stipitate-glandular;

blade broadly ovate to nearly orbiculate, shallowly 5–7-lobed, 3–8 cm, base deeply cordate, lobes rounded, margins dentate, apex obtuse, surfaces long stipitate-glandular.

Inflorescences

dense.

dense.

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 slightly bilaterally symmetric, free to 1 mm, green, broadly campanulate, inflated distal to adnation to ovary, 6–11 mm, short stipitate-glandular and sparsely long stipitate-glandular, densely papillate inside;

sepals erect, darker green-tipped, equal, 4–6 mm, apex obtuse or rounded;

petals absent or 1–5, erect, green, narrowly lanceolate, unlobed, 1.2–1.4 mm, margins entire;

stamens included 2–3 mm; (filaments erect, straight, stout, ca. 3 times length of anthers);

styles included 2–2.5 mm, 0.5–1 mm, 0.1+ mm diam.

Capsules

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

ovoid, 10–12 mm, beaks divergent, not papillose.

Seeds

dark brown, ellipsoid, 0.6 mm.

dark brown, ellipsoid, 0.6–0.9 mm, finely spiny.

2n

= 14.

Heuchera abramsii

Heuchera chlorantha

Phenology Flowering Jul–Aug. Flowering May–Aug.
Habitat Rocky soil in red fir forest Grassy, rocky bluffs along shore lines, margins of forest openings, rocky stream banks
Elevation 2800-3100 m (9200-10200 ft) 100-1200 m (300-3900 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
OR; WA; BC
[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 chlorantha occurs in the Pacific Northwest north to the Queen Charlotte Islands of British Columbia. Inland, it occurs from the eastern base of the Cascade Mountains westward in Oregon and Washington. A putative hybrid between H. chlorantha and H. micrantha var. diversifolia, named H. ×easthamii Calder & Savile, has been reported in the Hazelton region of British Columbia. The leaf form and capsule size are intermediate between those of the two parents, both of which occur in the region.

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

Source FNA vol. 8, p. 99. FNA vol. 8, p. 101.
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. bracteata, H. brevistaminea, H. caespitosa, H. caroliniana, 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
Name authority Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 109. 1905 , Piper: Contr. U.S. Natl. Herb. 16: 206. 1913 ,
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