Heuchera abramsii |
Heuchera grossulariifolia |
|
---|---|---|
Abrams' alumroot, San Gabriel alum-root |
gooseberry-leaf alumroot |
|
Habit | Herbs subcaulescent; caudex branched. | Herbs acaulescent; caudex branched. |
Flowering stems | 6–15 cm, short stipitate-glandular. |
15–65 cm, glabrous or short stipitate-glandular. |
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 glabrous or short stipitate-glandular; blade cordate or orbiculate, shallowly 3–5-lobed, 1–7 cm, base cordate, lobes rounded, margins dentate, apex obtuse, surfaces glabrous or short stipitate-glandular. |
Inflorescences | dense. |
dense, interrupted. |
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 weakly bilaterally symmetric, free 1.2–1.9 mm, cream, broadly campanulate, 4–7 mm, short stipitate-glandular; sepals erect, often red-tipped, equal, 2 mm, apex rounded; petals erect, pink or white, spatulate to narrowly oblanceolate, (clawed), unlobed, 1–3 mm, margins entire; stamens included 1.5 mm; (filaments strongly incurved, shorter than and almost concealed by anthers); styles included to 1 mm, 0.5 mm, 0.1+ mm diam. |
Capsules | ovoid, 3.5–5 mm, beaks divergent, not papillose. |
ovoid, 5 mm, beaks divergent, not papillose. |
Seeds | dark brown, ellipsoid, 0.6 mm. |
dark brown, ellipsoid, 0.6 mm. |
2n | = 14, 28. |
|
Heuchera abramsii |
Heuchera grossulariifolia |
|
Phenology | Flowering Jul–Aug. | Flowering May–Aug. |
Habitat | Rocky soil in red fir forest | Grassy hillsides, rocky canyon walls, alpine talus slopes |
Elevation | 2800-3100 m (9200-10200 ft) | 100-3400 m (300-11200 ft) |
Distribution |
CA |
ID; MT; NV; OR; WA
|
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 grossulariifolia includes both diploids and autotetraploids. K. A. Segraves and J. N. Thompson (1999) analyzed floral traits and flowering phenology in diploid and autotetraploid plants. Overall, plant size was greater in tetraploids than in diploids; flowers of tetraploids were larger (average hypanthium 6.5 mm) than those of diploids (average hypanthium 5.5 mm) and had a slightly different shape and phenology, but the diploids and tetraploids were not assigned taxonomic status in their study. Diploids and tetraploids were mixed in some populations, where characters intergraded (D. E. Soltis, pers. comm.). The autotetraploids have had two to seven independent origins from diploid progenitors, and do not represent a monophyletic lineage (Segraves and Thompson; Segraves et al. 1999). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 99. | FNA vol. 8, p. 103. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | H. cusickii, H. grossulariifolia var. tenuifolia, H. tenuifolia | |
Name authority | Rydberg: in N. L. Britton et al., N. Amer. Fl. 22: 109. 1905 , | Rydberg: Mem. New York Bot. Gard. 1: 196. (1900) |
Web links |