Heuchera hirsutissima

Herbs acaulescent; caudex branched. Flowering-stems 10–40 cm, short-stipitate-glandular and sparsely long-stipitate-glandular. Leaves: petiole long-stipitate-glandular; blade orbiculate to reniform, shallowly 5-lobed, 1–1.5 cm, base cordate, lobes rounded, margins dentate, apex obtuse, surfaces long-stipitate-glandular. Inflorescenses dense. Flowers: hypanthium strongly bilaterally symmetric, free 0.8 mm on abaxial side, 1.8 mm on adaxial side, pink, narrowly cylindric, 5–6.5 mm, short-stipitate-glandular proximally, densely long-stipitate-glandular distally; sepals spreading, green and red-tipped, unequal, 0.5–1.5 mm on abaxial side of hypanthium, to 0.5 mm on adaxial side, apex rounded; petals spreading, white, oblanceolate, (clawed), unlobed, 2–2.5 mm (equaling or longer than sepals, rarely shorter), margins entire; stamens exserted to 0.5 mm; styles included to 0.5 mm, 1.5 mm, 0.1+ mm diam. Capsules ovoid, 3 mm, beaks divergent, not papillose. Seeds dark-brown, ellipsoid, ca. 0.7 mm. 2n = 14.

Phenology: Flowering Jul–Aug.
Habitat: Fir and subalpine forest
Elevation: 2100-3500 m

Calif.

Discussion

Of conservation concern.

Heuchera hirsutissima is known from Mount San Jacinto and the San Jacinto Mountains of Riverside County and possibly the San Bernardino Mountains of San Bernardino County. It resembles H. caespitosa and H. elegans, except for its densely villous hypanthium and minute adaxial sepals.

Selected References

None.

Lower Taxa