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Boykinia rotundifolia is an uncommon species of flowering plant in the saxifrage family known by the common name Roundleafed Brookfoam. It is endemic to southern California from Ventura to San Diego Counties, where it grows in shady forested areas near streams in the mountains below 6,000 ft. It is a rhizomatous perennial herb producing leaves with blades up to 30 centimeters long, borne on petioles up to 18 centimeters in length. Each leaf has several rounded lobes with dull teeth along the edges. The flower cluster reaches up to a meter tall on a thin stem. It bears a dense array of many small white flowers, each with five tiny pointed sepals and five larger oval petals.
Perennial herb
1 - 3 ft Tall
1 ft Wide
Summer Semi-deciduous
White
Spring, Summer
Groundcover
Partial Shade
Moderate, High
Max 1x / month once established
Moderate
Tolerates cold to 15° F
Slow
Tolerates a variety of soils as long as adequate moisture is present.
Soil PH: 5.0 - 7.5
For propagating by seed: No treatment.
4*, 5*, 6, 7, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Streambanks, seeps, and other damp locations
Chaparral, Wetland-Riparian
This plant is best used in a damp shade garden with similar plants such as Heuchera spp., ferns, Meadow Rue (Thalictrum spp.), and Western Dichondra (Dichondra occidentalis)