Cynanchum viminale subsp. brunonianum (Wight & Arn.) Meve & Liede
Meve, U. & Liede-Schumann, S. (2012) Kew Bulletin 67: 754.
Caustic Bush; Vine, Caustic; Pencil, Caustic,; Caustic Pencil; Milkbush; Caustic Vine
Usually grows as a shrub-like plant but can also assume the architecture of a vine with a stem perhaps attaining 3-4 cm diam.
Leaves reduced to small, triangular scales about 1-1.5 mm long. Photosynthetic material present in the green succulent branches which produce copious amounts of milky exudate when cut or broken.
Inflorescence a short raceme or fascicle. Pedicels about 7-8 mm long. Flowers about 9-15 mm diam. Calyx lobes triangular, about 0.8-1 mm long. Corolla lobes about 5-6 x 2 mm, recurved. Staminal corona about 3-4 mm diam. Anthers about 1 mm long, appendages terminal. Carpels about 0.8-1 mm long. Styles free at the base, about 1.2 mm long. Style head about 0.8-1 mm.
Follicles about 7-9 x 0.4 cm. Seeds about 5-6 x 1.5-2 mm, plumes about 15-17 mm long.
Features not available.
A food plant for the larval stages of the Australian Crow Butterfly. Common & Waterhouse (1981).