Heuchera richardsonii |
Heuchera brevistaminea |
|
---|---|---|
Richardson's alum-root |
Laguna Mountain alumroot, Laguna Mountains alum-root, Mt. Laguna alumroot |
|
Habit | Herbs acaulescent; caudex branched. | Herbs acaulescent; caudex branched. |
Flowering stems | (7–)20–95 cm, densely long stipitate-glandular. |
20–30 cm, sparsely long stipitate-glandular. |
Leaves | petiole densely or sparsely long or short stipitate-glandular; blade broadly ovate or cordate, deeply 5–7-lobed, 2.5–10 cm, base cordate or nearly truncate, lobes rounded, margins dentate, apex acute, surfaces long stipitate-glandular abaxially, glabrous or long stipitate-glandular adaxially. |
petiole sparsely short to long stipitate-glandular; blade orbiculate or reniform, shallowly 5-lobed, 1.5–4 cm, base shallowly cordate, lobes rounded, margins dentate, apex obtuse, surfaces sparsely long stipitate-glandular on veins abaxially, glabrous or long stipitate-glandular adaxially. |
Inflorescences | dense to diffuse. |
|
Flowers | hypanthium strongly bilaterally symmetric, free 2–7 mm, green, campanulate, abruptly inflated distal to adnation to ovary, 5–14 mm, short stipitate-glandular; sepals erect, green-tipped, equal, 1.3–4.2 mm, apex rounded (sinuses wider than petals); petals erect, green or greenish white, rarely pink, narrowly spatulate, unlobed, 1.3–4 mm, margins finely dentate or coarsely fimbriate; stamens 1.5 mm included to 4 mm exserted; styles from 0.6 mm included to 0.3 mm exserted, 4–6 mm, to 0.1 mm diam. |
hypanthium weakly bilaterally symmetric, free 1.5–2.2 mm on adaxial side, deep rose-purple, cylindric, 4–5 mm, short stipitate-glandular proximally, long stipitate-glandular distally; sepals spreading, green- and darker red-tipped, equal, 1.3–1.4 mm, apex rounded; petals spreading, white, broadly oblanceolate, unlobed, 4–5 mm (much longer than sepals), margins entire; stamens included 1 mm; styles included 1–2 mm, 1.5 mm, 0.1+ mm diam. |
Capsules | ovoid, 7–14.5 mm, beaks divergent, not papillose. |
ovoid, 3 mm, beaks divergent, not papillose. |
Seeds | dark or very dark brown, ellipsoid, 0.6–0.9 mm. |
dark brown, ellipsoid, ca. 0.7 mm. |
Inflorescenses | moderately diffuse. |
|
2n | = 14, 28. |
|
Heuchera richardsonii |
Heuchera brevistaminea |
|
Phenology | Flowering May–Jun. | Flowering Jul–Sep. |
Habitat | Moist or dry, low or upland prairies, basic rock outcroppings and bluffs, sandy, dry woods | Rocky slopes in montane chaparral, yellow pine forests |
Elevation | 200-800 m (700-2600 ft) | 1500-1900 m (4900-6200 ft) |
Distribution |
CO; IA; IL; IN; KS; MI; MN; MO; MT; ND; NE; OK; SD; WI; WY; AB; BC; MB; NT; ON; SK
|
CA |
Discussion | Heuchera richardsonii intergrades with H. americana where their ranges overlap in Arkansas, Illinois, Indiana, Michigan, Missouri, and Oklahoma; the intergrading form is recognized here as H. americana var. hirsuticaulis. Heuchera hispida (H. americana var. hispida here; see thereunder) was confused with H. richardsonii for almost a hundred years, until C. O. Rosendahl et al. (1933) pointed out that the plants from the Midwest then passing as H. hispida Pursh were distinct from Pursh’s species and were H. richardsonii. The Blackfoot, Cree, Lakota, and Woodlands Indians used decoctions and infusions of the roots of Heuchera richardsonii for diarrhea and as an eyewash, and the Lakota applied a poultice of powdered roots to sores (D. E. Moerman 1998). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Heuchera brevistaminea occurs in the Laguna Mountains, San Diego County. It closely resembles H. abramsii, H. caespitosa, H. elegans, and H. pulchella. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 96. | FNA vol. 8, p. 99. |
Parent taxa | Saxifragaceae > Heuchera | Saxifragaceae > Heuchera |
Sibling taxa | ||
Synonyms | H. richardsonii var. affinis, H. richardsonii var. grayana, H. richardsonii var. hispidior | |
Name authority | R. Brown: in J. Franklin et al., Narr. Journey Polar Sea, 766, plate 29. (1823) | Wiggins: Contr. Dudley Herb. 1: 100, plate 8. 1929 , |
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