1	Flowers white, sometimes with purplish apex, usually narrowly crested.		16 C. fangshanensis
+	Flowers yellow, never purple tipped		(2)
2 (1)	Plants densely hairy with short vesicular hairs.		18 C. tomentella
+	Plants glabrous		(3)
3 (2)	Leaflets green, discrete, 2-3 cm wide; growth lax; outer petals with high short dorsal crests, not extending to apex.		15 C. saxicola
+	Leaves very glaucous, more divided with less distinct and much smaller leaflets; growth much condensed; crest of outer petals low or absent		(4)
4 (3)	Leaves ovate-lanceolate, with 4-7 pairs of leaflets; pedicels 3-6 mm, not elongating but sharply reflexed in fruit; capsule linear, 25-35 × 1.5-2 mm, quadrangular in cross section; seeds ca. 1 mm; stigma bifid with ascending lobes, each with 2 confluent papillae.		17 C. wilsonii
+	Leaves broadly ovate, with 2-5 pairs of leaflets; pedicels 6-12 mm in anthesis, often elongating and recurved in fruit; capsule oblong, 10-25 × 3-4 mm; seeds ca. 1.5 mm; stigma with widely divergent lobes, upper inner pair of papillae distinct		(5)
5 (4)	Racemes elongate, equaling leaves; stem internodes usually distinct but sometimes short; fruiting pedicels 10-20 mm; capsules 15-20 mm.		19 C. latiloba
+	Racemes condensed, much shorter than leaves; stem internodes very short; fruiting pedicels 15-30 mm; capsules ca. 6 mm.		20 C. pseudorupestris