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Mill Creek alum-root, Parish's alumroot

Heuchera merriamii

Canyon Creek alumroot, Merriam's alumroot

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

8–40 cm, long stipitate-glandular, viscid.

11–32 cm, long stipitate-glandular or glabrate.

Leaves

petiole densely long stipitate-glandular;

blade broadly ovate or reniform, deeply 5-lobed, 2–4 cm, base cordate or truncate, lobes rounded, margins dentate, apex obtuse, surfaces long stipitate-glandular, viscid.

petiole (2.4–5 cm), moderately long stipitate-glandular;

blade orbiculate, reniform, or pentagonal, shallowly 5–7-lobed, 2.5–4.5 cm, base shallowly cordate to truncate, lobes rounded, margins dentate, apex rounded to obtuse, surfaces finely long stipitate-glandular abaxially, sparsely long stipitate-glandular adaxially.

Inflorescences

dense, (secund).

dense; (bracts linear and scarious to 3–5-parted and herbaceous).

Flowers

hypanthium strongly bilaterally symmetric, free 0.8 mm on abaxial side, 1.2–2 mm on adaxial side, weakly inflated, pink to reddish, narrowly campanulate, 3.5–6 mm, short stipitate-glandular proximally, long stipitate-glandular distally;

sepals erect, green-tipped, unequal, 0.5–1 mm on abaxial side, 1.5–2 mm on adaxial side, apex rounded;

petals spreading, pink, narrowly oblanceolate, unlobed, (unequal, shorter on abaxial side, resembling filaments), 2–3 mm (equaling or longer than sepals), margins entire;

stamens exserted 1.5 mm;

styles exserted 0.5–1.5 mm, 1.5–2.5 mm, 0.1+ mm diam.

hypanthium radially symmetric, free 0.5–1.5 mm, pink, hemispheric, 3–5.5 mm, (base rounded), densely long stipitate-glandular;

sepals erect, green- or red-tipped, equal, 1–2 mm (often wider than long), apex obtuse;

petals erect, white, oblanceolate, (clawed), unlobed, 2–3.5 mm, margins entire;

stamens exserted 0.8–2 mm;

styles exserted 1–2 mm, 1.5–2.5 mm, 0.1+ mm diam.

Capsules

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

ovoid, 3–5 mm, beaks divergent, not papillose.

Seeds

black, fusiform, rounded at 1 end, acute at other, ca. 0.9 mm.

dark brown, ellipsoid, 0.6 mm.

2n

= 14.

Heuchera parishii

Heuchera merriamii

Phenology Flowering Jul–Aug. Flowering Jul–Aug.
Habitat Shaded rocky places in yellow pine and red fir forest Exposed granite ledges in subalpine forests
Elevation 1500-3800 m (4900-12500 ft) 1500-2500 m (4900-8200 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Heuchera parishii occurs in the San Bernardino Mountains.

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

Heuchera merriamii is known from the Siskiyou and Trinity mountains.

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

Source FNA vol. 8, p. 98. FNA vol. 8, p. 93.
Parent taxa Saxifragaceae > Heuchera Saxifragaceae > Heuchera
Sibling taxa
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. 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. 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 H. alpestris
Name authority Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 109. (1905) Eastwood: Bull. Torrey Bot. Club 32: 199. 1905 (as merriami),
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