San Luis Obispo serpentine dudleya

Dudleya bettinae Hoover, Leafl. W. Bot. 10: 186. 1965

Caudices closely branched, 1-3 cm diam. Leaves: rosettes 100+; blade oblong, subterete, 2-7 × 0.3-0.7 cm. Inflorescences: floral shoots 15-25 × 0.2-0.5 cm; proximalmost leaf blades 10-20 mm; branches often 1-2, simple. Pedicels 1-4 mm. Flowers: calyx 4-6 × 4-7 mm; petals connate 1.5-2 mm, straw yellow, red-lineolate, 8-16 × 2.5-4 mm, tips erect. 2n = 34.

Flowering early summer. Barren serpentine outcrops; of conservation concern; 0-200 m; Calif.

Subspecies bettinae can form clumps to 4 dm in diameter. It is known from near the coast west of San Luis Obispo and west of the range of subsp. murina; it is considered fairly endangered (California Native Plant Society, http://cnps.web.aplus.net/cgi-bin/inv/inventory.cgi). R. F. Hoover (1965, 1970) listed as Dudleya parva what seems to be a smaller form of this subspecies, local near San Bernardo Creek and the mouth of Chorro Creek.