California lace fern

Hypolepis californica Hooker, Sp. Fil. 2: 71, plate 88a. 1851; Cheilanthes californica (Hooker) Mettenius

Leaves monomorphic, 10--35 cm. Blade 4(--5)-pinnate, 3--12 cm, nearly as wide as long, papery. Ultimate segments lanceolate or deltate, 1.5--4 mm; midrib usually obscure abaxially. Sori of mature blades short, discrete, 1--3(--5) per segment; indusia semicircular, margins with 2--6 coarse, irregular teeth or ± entire. 2 n = 60, 120.

Rocky outcrops and crevices (not serpentine), moist to dry, shaded slopes and cliffs; 20--1300 m; Calif.; Mexico in n Baja California.