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Abrams' alumroot, San Gabriel alum-root

alum root, hairy alumroot, Parish's alumroot, seaside alum-root

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

6–15 cm, short stipitate-glandular.

3–22 cm, short to long stipitate-glandular, viscid.

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 (7–22 cm), densely long stipitate-glandular;

blade suborbiculate or pentagonal or septagonal, deeply 5–7-lobed, 8–9 cm, base deeply cordate, lobes rounded, margins crenate, apex obtuse, surfaces moderately to densely long stipitate-glandular, viscid.

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 radially symmetric, free to 1.6 mm, pink, hemispheric, 2–3 mm, densely long stipitate-glandular;

sepals erect, green- or red-tipped, equal, 0.8–2.2 mm, apex obtuse;

petals spreading, white or pink, oblong-elliptic, unlobed, 1.5–3.5 mm, margins entire;

stamens exserted 0.4–2.3 mm;

styles exserted 1–1.4 mm, 1.5–2 mm, 0.1+ mm diam.

Capsules

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

ovoid, 2.5–10 mm, beaks divergent, not papillose.

Seeds

dark brown, ellipsoid, 0.6 mm.

black, broadly fusiform, 0.6 mm.

2n

= 14, 28.

Heuchera abramsii

Heuchera pilosissima

Phenology Flowering Jul–Aug. Flowering Mar–Jun.
Habitat Rocky soil in red fir forest Pine belts on coastal bluffs on sandstone or decomposed granite
Elevation 2800-3100 m (9200-10200 ft) 10-500 m (0-1600 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
CA; OR
[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 pilosissima occurs in the marine zone and in the Coast Ranges.

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

Source FNA vol. 8, p. 99. FNA vol. 8, p. 93.
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. 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. pubescens, H. pulchella, H. richardsonii, H. rubescens, H. sanguinea, H. villosa, H. wootonii
Synonyms H. hemisphaerica, H. pilosissima var. hemisphaerica
Name authority Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 109. 1905 , Fischer & C. A. Meyer: Index Seminum (St. Petersburg) 5: 36. 1838 ,
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