| 1. Leaf blade angled, finely toothed, or weakly lobed at base; tendril branched > 1 cm from base |
| C. foetidissima |
| 1' Leaf blade deeply lobed; tendril branched ± from base |
| |
| 2. Leaf blade lobes ± linear-lanceolate, distinct nearly to petiole |
| C. digitata |
| 2' Leaf blade lobes triangular or widely lanceolate, distinct ± 1/2 to petiole |
| C. palmata
|