1	Flowers yellow or cream		(2)
+	Flowers blue to purple		(3)
2 (1)	Flowers 12-19 mm; fruit linear-oblong.		249 C. cytisiflora
+	Flowers 11-12 mm; fruit broadly obovoid.		250 C. nematopoda
3 (1)	Storage roots rounded to oblong, sharply set off by long thin stalks.		254 C. curviflora
+	Storage roots narrowly fusiform, smoothly tapering to base, often thin		(4)
4 (3)	Crest of outer petals overtopping apex; storage roots thin; most bracts entire		(5)
+	Crest of upper petal not overtopping apex; storage roots thin or thick; bracts entire or divided		(6)
5 (4)	Outer petals entire; corolla clear blue; stigma with 4 marginal simple papillae; racemes 3-14-flowered (Lhasa).		251 C. pseudofilisecta
+	Outer petals usually dentate; corolla yellow, cream, blue, or purple; stigma with 6 prominent marginal simple papillae; racemes 10-30-flowered (N Sichuan).		249 C. cytisiflora
6 (4)	Bracts palmatisect; stigma with 2 inner apical papillae very long; ovules numerous (23 or 24).		252 C. verna
+	Bracts entire, except sometimes lower ones; apical stigma papillae ca. as broad as long; ovules fewer		(7)
7 (6)	Outer petals obtuse; storage roots 1-3 mm in diam.; bracts rarely divided; capsule broadly obovoid.		253 C. pachycentra
+	Outer petals broad, acute to acuminate; storage roots very thin, to 1 mm in diam.; lower bract often divided; capsule oblong		(8)
8 (7)	Stigma with pronounced basal lobes; racemes 10-15-flowered; inner petals white tipped; spur shorter than inner petals.		247 C. shensiana
+	Basal lobes of stigma not developed; racemes 3-9-flowered; inner petals not white tipped; spur equaling inner petals.		248 C. schistostigma