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FNA | Family List | FNA Vol. 8 | Saxifragaceae | Heuchera

6. Heuchera pilosissima Fischer & C. A. Meyer, Index Seminum (St. Petersburg). 5: 36. 1838.

Seaside alum-root

Heuchera hemisphaerica Rydberg; H. pilosissima var. hemisphaerica (Rydberg) Rosendahl

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.

Flowering Mar-Jun. Pine belts on coastal bluffs on sandstone or decomposed granite; 10-500 m; Calif., Oreg.

Heuchera pilosissima occurs in the marine zone and in the Coast Ranges.


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