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

5. Heuchera merriamii Eastwood, Bull. Torrey Bot. Club. 32: 199. 1905.

Herbs acaulescent; caudex branched or unbranched. Flow-ering stems 11-32 cm, long stipitate-glandular or glabrate. Leaves: petiole (2.4-5 cm), mod-erately long stipitate-glandular; blade orbiculate, reniform, or pentagonal, shallowly 5-7-lobed, 2.5-4.5 cm, base shallowly cordate to truncate, lobes rounded, margins dentate, apex rounded to obtuse, surfaces finely long stipitate-glandular abaxially, sparsely long stipitate-glandular adaxially. Inflorescences dense; (bracts linear and scarious to 3-5-parted and herbaceous). Flowers: hypanthium radially symmetric, free 0.5-1.5 mm, pink, hemispheric, 3-5.5 mm, (base rounded), densely long stipitate-glandular; sepals erect, green- or red-tipped, equal, 1-2 mm (often wider than long), apex obtuse; petals erect, white, oblanceolate, (clawed), unlobed, 2-3.5 mm, margins entire; stamens exserted 0.8-2 mm; styles exserted 1-2 mm, 1.5-2.5 mm, 0.1+ mm diam. Capsules ovoid, 3-5 mm, beaks divergent, not papillose. Seeds dark brown, ellipsoid, 0.6 mm. 2n = 14.

Flowering Jul-Aug. Exposed granite ledges in subalpine forests; 1500-2500 m; Calif., Oreg.

Heuchera merriamii is known from the Siskiyou and Trinity mountains.


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