1 | Floral leaves much reduced, distinct from opposite cauline leaves; flowers in lateral or terminal racemes |
1' | Floral leaves (or bracts) similar to opposite basal leaves; flowers apparently solitary, axillary |
2 | Racemes lateral; leaves large, 2-17 cm long, glabrous, lustrous or sublastrous |
2' | Racemes terminal; leaves small, 0.6-1.5(-2.0) cm long, dull, often pubescent |
3 | Pedicels very short, indistinct, rarely exceeding 2 mm |
3' | Pedicels distinct, 3-15 mm long, upcurved in fruit |
4 | Flowers white, 2-3 mm diam.; capsule 3-5 mm wide |
4' | Flowers blue, 4-6 mm diam.; capsule 4.5-6 mm wide |
5 | Leaves and bracts palmately divided into finger-like lobes |
5' | Leaves and bracts entire, toothed or shortly lobed |
6 | Calyx-lobes broadly ovate-deltoid with a wide base, shortly stipitate; corolla pallid; leaves reniform-suborbicular, 3-5-lobed |
6' | Calyx-lobes ovate, obovate or suborbicular, not deltoid |
7 | Lobes of capsule strongly divergent; pedicels up to 3 cm long; corolla blue and white |
7' | Lobes of capsule not markedly divergent |
8 | Leaves ovate, bluntly serrate; corolla bright blue; pedicels to about 10-12 mm long |
8' | Leaves suborbicular-flabellate or reniform, 7-9-lobed; corolla white; pedicels 8-35 mm long |