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littleflower alumroot

cave alumroot, little-flower alum-root

Habit Herbs acaulescent; caudex branched or unbranched.
Flowering stems

9–45 cm, short to long stipitate-glandular, viscid.

Leaves

petiole densely short stipitate-glandular;

blade surfaces densely short stipitate-glandular, hairs to 0.6 mm.

petiole usually long stipitate-glandular, sometimes short stipitate-glandular;

blade (often purple abaxially), reniform to orbiculate, shallowly 5–7-lobed, 3–13 cm, base cordate, lobes rounded, margins crenate, apex obtuse, surfaces short or long stipitate-glandular abaxially, short stipitate-glandular adaxially, viscid.

Inflorescences

diffuse.

Flowers

hypanthium radially symmetric, free to 0.3 mm, white or pink, obconic, 1.2–3.2 mm, short or moderately long stipitate-glandular;

sepals erect, green-tipped, equal, 0.5–1.3 mm, apex rounded;

petals reflexed, white or pink, narrowly oblanceolate, unlobed, 1.5–3.5 mm, margins entire;

stamens exserted 1.2–3.2 mm;

styles exserted 1–3 mm, 1.5–4 mm, to 0.1 mm diam.

Capsules

ovoid, 2–5.7 mm, (minutely stipitate-glandular or glabrous), beaks divergent, not papillose.

Seeds

dark brown, ovoid, 0.4–0.6 mm, smooth.

Hypanthia

densely short stipitate-glandular.

2n

= 14.

Heuchera parviflora var. puberula

Heuchera parviflora

Phenology Flowering Jul–Sep.
Habitat Shaded or north-facing sandstone or limestone ledges or rock undercuts
Elevation 200-500 m (700-1600 ft)
Distribution
from FNA
AR; IN; KY; MO
[BONAP county map]
from FNA
AL; AR; IL; IN; KY; MO; MS; NC; SC; TN; VA; WV
[WildflowerSearch map]
[BONAP county map]
Discussion

Variety puberula is uniformly short stipitate-glandular and is mostly restricted to the Ozark Mountains of Arkansas and Missouri, plus sites in central Kentucky and southern Indiana.

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

Varieties 2 (2 in the flora).

The specific epithet, parviflora, is similar to that of another species, Heuchera parvifolia, but these two species are distinct and have different legitimate names. The varieties of H. parviflora are not sympatric. The species merits phylogenetic study. The Blackfoot Indians applied a poultice of the pounded root to sores and swellings (D. E. Moerman 1998).

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

Key
1. Petioles and hypanthia sparsely to densely long stipitate-glandular; leaf blades sparsely to densely long stipitate-glandular abaxially, hairs 0.7- 2.5 mm.
var. parviflora
1. Petioles and hypanthia densely short stipitate- glandular; leaf blades densely short stipitate-glandular abaxially, hairs to 0.6 mm.
var. puberula
Source FNA vol. 8, p. 90. FNA vol. 8, p. 90.
Parent taxa Saxifragaceae > Heuchera > Heuchera parviflora Saxifragaceae > Heuchera
Sibling taxa
H. parviflora var. parviflora
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. parvifolia, H. pilosissima, H. pubescens, H. pulchella, H. richardsonii, H. rubescens, H. sanguinea, H. villosa, H. wootonii
Subordinate taxa
H. parviflora var. parviflora, H. parviflora var. puberula
Synonyms H. puberula
Name authority (Mackenzie & Bush) E. F. Wells: Rhodora 81: 577. (1979) Bartling: Index Seminum (Göttingen) 1838: 4. 1838 ,
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