San Gabriel alumroot
Heuchera abramsii Rydb.
San Gabriel alumroot is a diminutive perennial with a branching woody base and short flowering stems, typically 6–15 cm tall. Dense flower clusters rise above small leaves; gland-tipped hairs cover stems and foliage. Flora of North America: Heuchera abramsii
Botanical name
Heuchera abramsii Rydb. is an accepted species in the Flora of North America and ITIS treatments. It belongs to Saxifragaceae and is a narrowly distributed southern Californian alumroot. ITIS: Heuchera abramsii
Recognizing the plant
Leaf blades are only about 0.5–2 cm long and are deeply divided into five rounded lobes with toothed margins. The conspicuous reddish-purple part of each flower is the cylindrical floral cup, or hypanthium, rather than large colored petals. The actual petals are white, narrow and spreading, about 1.5–2.5 mm long. Unequal sepals have green tips. Slender styles project beyond the flower. The resulting egg-shaped capsules develop divergent beaks and contain very small, dark-brown seeds. Flora of North America: Heuchera abramsii
Bloom window
Southern California, United States
Flowering is recorded in July and August in its Californian mountain range. Flora of North America: Heuchera abramsii
Native range
The species is restricted to southern California’s San Antonio and eastern San Gabriel mountains, in Los Angeles and San Bernardino counties. The flora records it in rocky ground within red-fir forest at elevations of roughly 2,800–3,100 m. Flora of North America: Heuchera abramsii
Botanical sources
Reviewed 2026-10-11. Seasonal development varies with location and growing conditions.