Neoschumannia, Schlechter, 1905

Fischer, Eberhard, Killmann, Dorothee & Meve, Ulrich, 2013, Neoschumannia gishwatiensis (Apocynaceae, Asclepiadoideae-Ceropegieae) from Gishwati Forest, Rwanda-a third and new species from a disjunct African genus, Phytotaxa 77 (2), pp. 19-26 : 23-24

Key to the species of Neoschumannia

1. Tips of petals with a tuft of long purplish hairs, corolla lobes 15–20 × 3–4 mm, adaxially olive green to purple with whitish splash at base, tufts of purplish clavate-tipped hairs at base, column supporting gynostegium 3–4 mm tall.... ................................................................................................................................................................... N. cardinea

1*. Tips of petals nearly glabrous to pubescent, corolla lobes 7–18 × 2.5-3 mm or 24–28 × 9 mm, adaxially greenish with purple dots in the upper four firth, or emerald green and smooth and brilliant, with either purple or whitish clavate hairs at base, column supporting gynostegium 1.4–2.5 mm tall.................................................................................. 2

2. Corolla lobes 7–18 × 2.5–3 mm, adaxially greenish with purple dots in the upper four fifths, with purple clavate hairs at base, corona pubescent to villous, coronal skirt membranous and recurved, column supporting gynostegium 2–2.5 mm tall .............................................................................................................................................. N. kamerunensis

2*. Corolla lobes 24–28 × 9 mm, emerald green, smooth and brilliant, with whitish clavate hairs at base, corona glabrous, coronal skirt fleshy and spreading, column supporting gynostegium ca. 1.4 mm tall ............. N. gishwatiensis