Capsule globose, 6 mm. in diameter.
Seeds as in species 4, I. polymorpha.
Perennial; stems numerous from a fusiform tuberous rootstock, slender, 9–30 cm. long, prostrate or ascending, densely white-pilose above, glabrescent beneath.
Leaves very variable; radical ones largest; blades up to 8 cm. long and 1–4 cm. wide, 2–5(–9)-lobed or rarely entire or undulate, with lanceolate or oblong sparsely pilose lobes, the apical lobe the largest; upper cauline leaves smaller, subpalmately or pinnately 3–5-lobed, with linear to lanceolate lobes, the middle lobes usually longest and often lobed or toothed.
Calyx densely long-pilose, 1.2 cm. long, very similar to that of the last 2 species.
Corolla mauve and white, tubular below; limb ± salver-shaped, l.4–3.2(–4) cm. long.
Flowers axillary, solitary, subsessile, or pedicel up to 12 mm. long.
Capsule globose, glabrous, straw-coloured.
Stems numerous, slender, up to 50 cm. long, prostrate or ascending, densely white-pilose above, glabrescent beneath.
Seeds densely appressed pubescent.
Leaves very variable, the basal ones rosulate, (if present) long petiolate with a petiole up to 5 cm. long); leaf lamina lanceolate or linear, up to 8 × 1 cm., entire or with 1–2 lateral teeth or lobes or repando-pinnatisect 2–7–lobed, pilose, the apical lobe usually longer; cauline leaves 2–6·5 cm. long, usually subpalmately or pinnately 3–7–lobed, with linear to lanceolate lobes, the middle ones usually longest and often lobed or dentate at first with soft silvery-white hairs, soon glabrescent, main nerves prominent beneath.
Perennial, with a fusiform tuberous rootstock.
Flowers axillary, solitary, subsessile or with a pedicel up to 15 mm. long; bracteoles linear-subulate or linear-filiform, 10–15 × 0·5 mm., pubescent.
Corolla narrowly funnel-shaped with spreading limb, mauve to purple, 2·3–5 cm. long, midpetaline areas glabrous.