FIGURE 1. Argostemma tortilobum. A in Argostemma tortilobum (Rubiaceae), a new species from Vietnam

FIGURE 1. Argostemma tortilobum. A. Habitat and habit; B. Flowering plants with white veins on leaf blades; C. A flowering plant with green veins on leaf blades and an inflorescence with a small branch at the base; D. Distal part of an inflorescence, showing young flowers with four pilose edges (sutures of corolla lobes) and one opened-flower with marginally ciliate calyx, star-shaped corolla, twisted corolla lobes and four free yellow anthers. Photographed by Yi-Hua Tong.