;"I. campestris";"I. attenuata";"I. dolichopoda";"I. ensiformis" Habit;"usually erect, sometimes decumbent";"decumbent or climbing";decumbent;procumbent Indumentum;pubescent;pubescent;"pilose with long spreading white hairs";"thinly pubescent, glabrescent" "Leaf size";"4–10 × 0.1–1 cm";"4–10 × 0.3–0.7 cm";"4–6.5 × 0.8–1.5 cm";"2–6 × 0.3–1.6 cm" Inflorescence;"simple axillary cymes of 1–2 flowers";"elongate, complex cymes, racemose in form";"axillary cymes with long secondary peduncles";"simple axillary cymes of 1(–2) flowers" Peduncles;"0.2–1.5 cm, relatively stout";"2–7 cm";"0.3–12 cm";"1.4–3.2 cm" Bracteoles;"Linear, 1–2 mm, caducous";"Linear-lanceolate, 4–7 mm, persistent";"filiform, 9–12 mm, tardily caducous";"ovate, 3 mm, tardily caducous" Pedicels;"3–9 mm";"3–5 mm";"8–15 mm";"5–6 mm" "Sepal length";"8–11 mm";"11–14 mm";"10–14 mm";"6–8 mm" "Sepal shape";"oblong-ovate, apex acute, base rounded";"ovate, apex acuminate to attenuate, base truncate";"ovate, apex acuminate and mucronate, base truncate";"oblong-ovate, apex obtuse, base rounded" "Corolla length";"3.5–6 cm";"4–5 cm";"c. 5.5 cm";"3–4 cm" "Corolla indumentum (exterior)";pubescent;pubescent;glabrous;"Sparsely pubescent"