Flora of North America species comparison

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Heuchera pilosissima

alum root, hairy alumroot, Parish's alumroot, seaside alum-root
Habit Herbs caulescent; caudex branched.
Flowering stems

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

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.
Flowers

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

black, broadly fusiform, 0.6 mm.
2n

= 14, 28.

Heuchera pilosissima
Phenology Flowering Mar–Jun.
Habitat Pine belts on coastal bluffs on sandstone or decomposed granite
Elevation 10-500 m (0-1600 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

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. 93.
Parent taxa 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. 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 Fischer & C. A. Meyer: Index Seminum (St. Petersburg) 5: 36. 1838 ,
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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