1 | Segments of epicalyx partly united, attached to apex of pedicel |
1' | Segments of epicalyx free, usually attached to apex of pedicel |
2 | Flowers in axillary clusters, rarely solitary, subsessile or shortly pedicellate; petals about 1.5 cm long |
2' | Flowers solitary, axillary, petals about 2-3 cm long |
3 | Flowers subsessile or shortly pedicellate; shrub 1-3 m high |
3' | Flowers with long, divaricate pedicels, herb 20-100 cm high |
4 | Flowers solitary, axillary; annual herbs |
4' | Flowers clustered, axillary |
5 | Stems patently strigose; erect herbs, 10-60 cm high; basal leaves broadly cordate or almost orbicular |
5' | Stems adpressed-strigose; decumbent or suberect herbs, 5-15 cm. high, all the leaves deeply laciniate |
6 | Epicalyx with ovate or broadly lanceolate or oblanceolate segments |
6' | Epicalyx with linear or filiform segments |
7 | Petals 15-20 mm long; plant 30-150 cm high |
7' | Petals 7-10 mm long; plant 7-40 cm high |
8 | Leaves with shallow, obtuse, crenate or shortly dentate lobes |
8' | Leaves deeply incised, with sharply dentate lobes |
9 | Dorsal surface of carpels obscurely reticulate; calyx not noticeably accrescent in fruit |
9' | Dorsal surface of carpels strongly reticulate; calyx conspicuously accrescent in fruit |