Caltha biflora | Howell's marshmarigold

There are only about ten members of the Caltha genus. All grow in moist, boggy conditions and all bloom in spring or summer with typical buttercup flowers. Attractive, glossy green leaves are generally heart or kidney shaped. We adore them all.

Caltha biflora has adorable white and yellow flowers that crown the fleshy leaves in summer. It is generally found west of the Cascade crest in Washington; Alaska to California, east to western Nevada.

Syn. Caltha biflora var. biflora, Caltha howellii, Caltha leptosepala ssp. biflora, Caltha leptosepala ssp. howellii, and Caltha leptosepala var. biflora

Zones: 2 to 8 
Family: Ranunculaceae
Type: Perennial
Height: 4 to 16 in.
Spread: 6 to 12 in.
Exposure: part shade to full shade
Soil Conditions: moist, boggy
Bloom Time: May to June
Bloom Color: whitish with yellow centers
Native Range: alpine regions of western North America, from Alaska south to New Mexico