川西紫堇 chuan xi zi jin

Corydalis crassirhizomata (C. Y. Wu) C. Y. Wu; C. schusteriana Fedde var. crassirhizomata C. Y. Wu.

Herbs, perennial, 30-80 cm tall. Rhizome horizontal, 2-6 × 1-1.5 cm, densely clad with imbricate fleshy scales in 2 rows. Stems suberect, simple or with a branch in inflorescence, with 2-4 leaves in upper 1/2. Radical leaves 1-4; petiole 14-20 cm, base broad and fleshy; blade pruinose abaxially, green adaxially, deltoid, 5-10 × 5-9 cm, triternate; primary leaflets long petiolulate; secondary leaflets almost sessile, pinnately deeply or slightly divided to coarsely dentate; lobules oblong to obovate, rounded to obtuse, mucronulate. Cauline leaves: lower petiole ca. 2 cm, upper almost sessile, like radical leaves. Raceme ca. 3 cm, 10-17-flowered; lower bracts deeply laciniate, 10-15 mm, segments narrowly lanceolate to linear, acute; uppermost bracts often entire. Pedicel 10-15 mm, ca. 20 mm in fruit. Sepals white, 1.5-2 × 1-2 mm, dentate. Corolla ?pale red; upper petal 27-30 mm, shortly acuminate, without crest; spur narrowly cylindric or slightly tapering at apex, 16-18 mm; nectary sigmoidally curved at apex, 1/2-3/5 as long as spur; lower petal 13-14 mm, spatulate with narrow claw, navicular-rhombic; inner petals 11-13 mm. Stigma square; marginal simple papillae not recorded; geminate papillae in basal corners; basal lobes not developed. Capsule reflexed from straight pedicel, narrowly elliptic, 13-14 × 3-4 mm, valves thick; style ca. 5 mm. Fl. and fr. May-Jul.

● Understories of subalpine conifer forests, streamsides; 2700-3500 m. W Sichuan (Mianning, Ya’an; old uncertain localities: Kangding, Tongolo).