1 | Annuals |
1' | Perennials |
2 | Flowers sessile or subsessile; capsule hirsute |
2' | Flowers distinctly stalked; capsule glabrous |
3 | Corolla 1.5-2.8 cm diam., pink or purplish; lower leaves broadly cordate or reniform, upper often lobed; seeds 3-4 mm long |
3' | Corolla not more than 1.5 cm diam., blue; upper leaves not lobed; seeds c. 2-2.5 mm |
4 | Leaves oblong or narrowly cordate, distinctly petiolate |
4' | Leaves narrowly obovate or oblanceolate, sessile or narrowed to an indistinct petiole |
5 | Climbing or trailing herbs; rootstock usually not woody |
5' | Erect or suberect herbs or subshrubs; rootstock usually woody |
6 | Upper cauline leaves deeply palmatisect |
6' | Upper cauline leaves not palmatisect |
7 | Leaves oblong, oblanceolate or elliptic |
7' | Leaves cordate or hastate |
8 | Plants glabrous or very sparsely pubescent; corolla up to 3 cm diam. |
8' | Plants hairy or distinctly pubescent; corolla often more than 3 cm diam. |
9 | Stems woody, persistent |
9' | Stems herbaceous, dying back in winter |
10 | Sepals clothed with spreading hairs |
10' | Sepals clothed with adpressed hairs |
11 | Plant erect, 30-60 cm high; inflorescence almost leafless with numerous, divaricate branches |
11' | Plant decumbent, less than 30 cm high; inflorescence terminal on sparsely branched leafy stems |
12 | Sepals clothed with adpressed hairs |
12' | Sepals clothed with spreading hairs |