• Scientific Name: Corydalis humosa Migo
• Ref: J. Shanghai Sci. Inst. Sect. 3, 4:146. 1939
• Chinese Common Name: 土元胡 tǔ∙yuánhú
• Family: Papaveraceae
• Genus: Corydalis
• Distribution: Forests, forest margins; 800-1000 m. NW Zhejiang (Tianmu Shan).
• Photo: 04/07/2007, Qingliang Peak, Zhejiang

Herbs, perennial. Tuber globose, 6-8 mm in diam. Stems 9-20 cm, slender, with 1-3 branches from prophyll, sometimes branched also from lower cauline leaf. Leaves glaucous abaxially, green adaxially, biternate, with long petiole and petiolules; leaflets very discrete, elliptic to ovate, 8-14 × 4-12 mm, entire, sometimes divided into obovate segments. Raceme lax, 1-3-flowered; bracts ovate to ovate-lanceolate, 4-6 × 2-3 mm. Pedicel 7-15 mm, slender. Sepals caducous, small. Flowers white. Upper petal 10-12 mm, limb broad and flat, apex retuse; spur upcurved, 5-7 mm; nectary extended through 1/3-1/2 of spur, obtuse; lower petal ca. 6 mm, base saccate, apex retuse; inner petals ca. 4 mm. Capsule ovoid, together with beak and style ca. 12 × 3-4 mm, 5-9-seeded. Seeds in 2 rows. Fl. and fr. Mar-May. (Flora of China)