| 1 | Leaves with only two leaflets (sometimes up to 4 in C. diphylla in same plant); leaflets with entire margins |
| 1' | Leaves with > than 4 leaflets; leaflets with serrate or crenate margins |
| 2 | Leaflets obovate or elliptic, abaxially ferruginous-tomentulose, especially along the prominent veins; tertiary veins prominent, subclathrate; margins slightly revolute |
| 2' | Leaflets elliptic or oblong-elliptic, abaxially glabrous except for the puberulent midvein; tertiary veins non-prominent, reticulate; margins strongly revolute |
| 3 | Leaflets abaxially puberulous or glabrous |
| 3' | Leaflets abaxially hirsute or hispid |
| 4 | Leaflets with pit domatia on secondary vein axils, tertiary veins reticulate; margins remotely serrate, entire, subentire, repando-dentate, and undulate; apex acute or shortly acuminate, or sometimes rounded and retuse |
| 4' | Leaflets lacking pit domatia on secondary vein axils, tertiary veins subclathrate; margins slightly crenate; apex acuminate, caudate, obtusely acuminate, or sometimes obtuse and retuse |
| 5 | Leaflets obovate to oblanceolate, retuse at apex; capsule trigonous-depressed-globose |
| 5' | Leaflets elliptic, oblong, or oblanceolate, acute, acuminate, apiculate, or sometimes obtuse or minutely retuse at apex; capsule deeply trilobate or tricoccate |
| 6 | Plant hirsute; leaflets chartaceous or sometimes subcoriaceous, the blade flat, with acute, acuminate or apiculate apex, margins straight or slightly revolute, abaxial surface hirsute along the prominent network of veins; capsules hirsute |
| 6' | Plant tomentose; leaflets coriaceous, the blade conduplicate, with obtuse or slightly retuse apex, margins revolute or strongly revolute, abaxial surface hirtellous; capsules sericeous-tomentose |
