Green-flowered Alumroot, Meadow Alumroot, Tall Alumroot: Heuchera chlorantha - Racemes of closely spaced, tiny white or green flowers. Leaves basal with orbicular, lobed blades. Leaf petioles hairy and several times longer than leaf blades.
Lava Alumroot, Roundleaf Alumroot: Heuchera cylindrica var. alpina (Synonyms: Heuchera cylindrica var. orbicularis, Heuchera ovalifolia, Heuchera ovalifolia var. ovalifolia, Heuchera ovalifolia var. thompsonii) - Thick poker-like spike of creamy bell-shaped flowers well above the maple-like leaves. Petioles not hairy and about as long as the leaf blades. Racemes of closely spaced flowers. Could be confused with Heuchera grossulariifolia.
Roundleaf Alumroot, Lava Alumroot: Heuchera cylindrica var. cylindrica -
Roundleaf Alumroot, Lava Alumroot: Heuchera cylindrica var. glabella -
Alpine Alumroot, Alpine Heuchera, Mat Alumroot, Smooth Alumroot: Heuchera glabra - Flowers tiny, white in an open, spreading panicle. Leaves maple-like with 5-7 deeply cleft lobes. Stems and petioles hairless. Petioles have 2-lobed stipules at their base with only a few hairs on their margins. Similar to Heuchera micrantha.
Currant-leaf Alumroot, Gooseberry-leaved Alumroot, Thin-leaved Alumroot: Heuchera grossulariifolia var. tenuifolia (Synonym: Heuchera tenuifolia) - Basal leaves orbicular heart-shaped to spatulate and from 3-7 cm wide. Margins lobed, the lobes with smaller teeth or clefts. Petals generally shorter than the sepals. Calyx narrowly bell-shaped with lanceolate lobes (sepals). Could be confused with Heuchera cylindrica.
Merriam's Alumroot, Merriam's Heuchera: Heuchera merriamii -
Pacific Alumroot, Smallflower Alumroot: Heuchera micrantha var. diversifolia (Synonyms: Heuchera diversifolia, Heuchera micrantha var. pacifica) -
Smallflower Alumroot, Small-flowered Alumroot: Heuchera micrantha var. micrantha -
Seaside Heuchera: Heuchera pilosissima -