Dudleya abramsii subsp. costatifolia (Bartel & Shevock) Moran

Caudices branching, 1.5-2 cm diam. Leaves: rosettes 5-40; blade linear, subterete, 4-8 × 0.2-0.8 cm. Inflorescences: floral shoots 5-15(-20) × 0.1-0.4 cm; proximalmost leaf blades 4-20 mm; branches 2-4, 1-3 times bifurcate. Pedicels 3-9(-17) mm. Flowers: calyx 4-6 × 4-6 mm; petals connate 1-3 mm, bright yellow, not lineolate, 5-13(-17) × 2-4 mm, tips spreading. 2n = 34.