;"I. erecticornis";"I. filicornu";"I. smetsiana";"I. kamerunensis subsp. kamerunensis";"I. kamerunensis subsp. obanensis";"I. nzabiana" "Height (cm)";40–150;35;40–60;40;"50–60 (100)";40 "Leaf arrangement";spirally;spirally;spirally;opposite-subopposite;spirally;spirally "Petiole length(cm)";1.2–7.5;2.5–6;2–6.3;0.5–4;0.5–4;1.2–2.5 "Leaf size (cm)";"5.4–14.3 × 2.4–7.0";"3.2–8.5 × 1–5";"7.5–11 × 3.7–4.5";"2.8–10 × 1.6–3.8";"4.3–14 × 2.2–7.0";"3–5 × 0.9–1.3" "Leaf shape";ovate;"ovate-narrowly ovate (elliptic)";elliptic;"ovate, oblong-narrowly ovate";"ovate, oblong-narrowly ovate";"narrowly ovate-rhombic to narrowly elliptic" "Leaf apex";acuminate;"acute to shortly acuminate";acuminate;"acute to acuminate";"acute to acuminate";acuminate "Leaf base";"cuneate- attenuate";attenuate-rounded;attenuate;"rounded-shortly attenuate";"rounded-shortly attenuate";cuneate "Lateral veins";"7–10 pairs";"4–5(–6) pairs";"5–7 pairs";"4–9 pairs";"4–9 pairs";"6–8 pairs" "Leaf margin";crenate;"shallowly crenate";crenate;"shallowly crenate to crenate-serrate";"shallowly crenate to crenate-serrate";"finely crenate-serrate" Fimbriae;present;present;absent;"often present";"often present";present Inflorescence;"3–6 flowered subumbellate raceme";"4–9 flowered subumbellate raceme";"6–many flowered subumbellate raceme";"lax 6–many flowered axillary or pseudo-terminal raceme";"lax 6–many flowered axillary or pseudo-terminal raceme";"lax axillary racemes" "Flower colour";pink;pink-purplish;pink;pink-purplish;pink-purplish;pink "Peduncle length (cm)";3–9.5;8–14;5.5–14;5.5–16;5.8–26;11–12 "Bract size (mm)";"5–8 × 4–6";"3–6 × 3–4";"5–6 × 4–5";2–4.5;2–4.5;1 "Bract shape";ovate;ovate;ovate;"ovate lanceolate to linear lanceolate";"ovate lanceolate to linear lanceolate";"linear lanceolate" "Lateral sepal length (mm)";6–7;3–4;3.8–4.5;2.5–4;2.5–4;1.2 "Lateral sepal shape";ovate;ovate;ovate;"ovate lanceolate to linear lanceolate";"ovate lanceolate to linear lanceolate";"narrowly and obliquely navicular" "Lower sepal length (mm)";9–11;5;8–9;3–6;4–9;7–8 "Spur length (mm)";23–28;10–35;23–35;13–30;35–55;22.5–25 "Spur shape";"curved filiform";"curved filiform";"curved filiform";"curved filiform";"curved filiform";"curved and flattened filiform" "Dorsal petal size (mm)";"6–8 × 4–6";"4.4 × 4.0";"10.5 × 9.5";"3–13 × 3–10";"3–13 × 3–10";"5–6 × 7–8" "Dorsal petal shape";cucullate;oblong;"oblong-shallowly cucullate";oblong-suborbicular;oblong-suborbicular;suborbicular "Lateral united petals length (mm)";24–35;10–16;19–21;12–15;16–20;16.5–18.0 "Upper lateral petal size (mm)";"13–19 × 7–11";"8 × 2–3";"12–13 × 8–9";"7–13 × 3–10";"7–13 × 3–10";"12.0–13.5 × 5" "Upper lateral petal shape";"oval-kidney shaped";"narrowly oblong-elliptic";"oval-kidney shaped";"transversely and broadly oblong to ± kidney shaped";"transversely and broadly oblong to ± kidney shaped";"narrowly oblong" "Lower lateral petal size (mm)";"15–27 × 8–13";"8–10 × 6–8";"15.5–16.5 ×12.5–13";"3–10 × 5.5–13";"3–10 × 5.5–13";"14.5–15.0 × 8.0–8.5" "Lower lateral petal shape";"asymmetrically obovate";suborbicular-oblong;"asymmetrically obovate";"suborbicular to obliquely oblong";"suborbicular to obliquely oblong";suborbicular "Size ligulate appendage of lower lateral petal (mm)";"not applicable";"3–5 × 1–2";"4–4.5 × 2.5–4.1";"3–7 × 1–2.5";"3–7 × 1–2.5";"7.0–7.5 × 2.5–3.0" "Fruit length (mm)";9–15;"13–5 mm";unknown;9–17;9–17;6.5