FIGURE 4. Vincetoxicum pingtaoanum Cai F. Zhang, G.W in Vincetoxicum pingtaoanum (Apocynaceae: Asclepiadeae), a new species from the Three Gorges District in Central China

FIGURE 4. Vincetoxicum pingtaoanum Cai F. Zhang, G.W. Hu & Q.F. Wang. A, leaf on lower stem, adaxial (leaf) and abaxial (right) surfaces; B, leaf on upper stem, adaxial (leaf) and abaxial (right) surfaces; C, flower in back view; D, flower in front view; E, flower in top view; F, gynostegium in top view; G, gynostegium and corona in side view; H, dissected gynostegium; I, pollinarium; J, compressed seeds with one surface slightly convex and papillose (left) and the other surface nearly flat (right); K, infructescence. C, D photographed by Hou-Lin Zhou from Wushan County; A, B photographed by Yan Wang from Hou-Lin Zhou in Cai-Fei Zhang 6512; E–K photographed by Yan Wang and Cai-Fei Zhang from the type collection.