16. Corydalis sect. Dactylotuber (Ruprecht) Popov in Schischkin, Fl. URSS. 7: 674. 1937.
指裂延胡索组 zhi lie yan hu suo zu
Capnites sect. Dactylotuber Ruprecht, Mém. Acad. Imp. Sci. Saint Pétersbourg, Sér. 7, 15(2): 58. 1869; Corydalis subsect. Elongatae Poellnitz.
Tuber/rootstock almost rounded to oblong, not hollow, usually branched below. Stems branched or not, lower part often underground, usually with 1-3 scales and 2-6 leaves. Leaves once to 3 × ternately compound (entire in Corydalis ludlowii); petiole vaginate at base. Racemes corymbose, few flowered; bracts usually entire. Capsule nutant from straight pedicel, obovoid, explosively dehiscent (except probably in C. gyrophylla and C. hepaticifolia, which might be erroneously placed in this section).
Thirteen species: C Asia from Sayan Mountains to NW North America, Caucasus to NW Turkey, China, Himalayas; nine species (seven endemic) in China.
The W Mongolian/S Siberian Corydalis pauciflora (Stephan ex Willdenow) Persoon (Syn. Pl. 2: 269. 1806) has been given for N Xinjiang (FRPS 32: 448. 1999). We have been unable to locate any Xinjiang material of this species, but the Altai occurrences in W Mongolia are geographically close. Corydalis pauciflora is easily distinguished from related species by its tall straight simple erect stem, more floriferous raceme (up to 10 flowers), larger bracts, larger sepals (ca. 2 × 2 mm), broader corolla, and much larger pouch or spurlet at the base of the lower petal.
We have not seen Corydalis pauciflora var. foliosa L. H. Zhou (Fl. Qinghai. 1: 508. 1997), described from E Qinghai.