Cynanchum carnosum—Mangrove Milkweed, Coastal Cynanchum—APOCYNACEAE

Cynanchum carnosum

Link to Images on Flickr.

Habitat— On margins of Littoral Rainforest, on Headlands and in Mangroves and Salt Marshes.

Distribution— North from the Booti Booti National Park near Forster in New South Wales and into Queensland. Also in Malaysia.

Description—Trailing herbaceous vine or scrambler with much-branched twining stems. Stems at first finely hairy but becoming hairless with age.

Local occurrences

Avicennia marina subsp. australasica Mangrove Woodland, Black Head, Burgess Beach, Burgess Road, Casuarina glauca Swamp Sclerophyll Forest and Woodland, Harrington, Juncus kraussii subsp. australiensis Rushland, Little Street Forster, Lophostemon confertus Wet Sclerophyll Forest, Melaleuca quinquenervia/Casuarina glauca Swamp Sclerophyll Forest and Woodland, Ohmas Bay, Saltmarsh Complex, Tern Island, The Booti Booti Complex, The Islands, The Wallis Lake Sand Barrier, Tiona Park, Tonie's Gully and Wallamba Cove

Leaves.— Simple, Opposite, hairless or almost so, clear latex present. Lamina oblong–oblanceolate to obovate or elliptic, occasionally linear to lanceolate, 2 to 5.5 cm long, 5 to 30 mm wide, apex mucronate, rather thick, semi–succulent, faintly veined, glands absent; petiole 2 to 13 mm long.

Cynanchum carnosum
Cynanchum carnosum

Inflorescence.—Pale green or yellowish green, 15 to 16 mm diam. Calyx lobes c. 2 mm long. Corolla lobes 6 to 7 mm long. Corona of 5 conspicuous, whitish, erect distinct segments, tips often recurved, longer than the column. Anthers red. Flowers bisexual

Flowering.—Throughout the year.

Fruit.—Follicles 5 to 7 cm long; seeds with coma 10 to 20mm long.

Ripe.—Throughout the year.

Cynanchum carnosum