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 ON THE ASCLEPIADEjE. 231

��PERIPLOCA. [Periplocse sp. Linn.

Char. Corolla rotata. Squamis 5 faucis laciniis alter- natibus, aristatis.

Mlamenta distincta. Antheræ cohaerentes, dorso barbatae.

Massce pollinis apici dilatato corpusculi stigmatis appli- citae, solitariae, e quatuor connuentibus.

Stigma submuticum.

Folliculi cylindracei, divaricatissimi, laeves. Semina comosa.

Habitus. Frutices saepius volubiles, glabri. Folia oppo- sita, nitida. Flores subcorymbosi interpetiolares.

Patria. Europa Australis. Syria. Africa Septen- trionalis et JEquinoctialis.

Obs. Periploca Graeca, and laevigata, are the two prin- cipal species of the genus. P. angustifolia, Billard. no doubt also belongs to it; and I have seen a fourth and very remarkable species brought from Sierra Leone by [58 Professor Afzelius, on account of which I have been obliged slightly to modify the character.

GYMNANTHERA.

Char. Corolla hypocrateriformis. Corona faucis 5phylla.

Filamenta distincta, fauci inserta. Anther a imberbes.

Massm pollinis quaternatim applicitae apici dilatato cor- pusculorum.

Stigma apiculo bifido.

Folliculi cylindracei, laeves, divaricatissimi. Semina co- mosa.

Habitus. Frutex volubilis, glaberrimus. Folia opposita, nitida. Fedunculi laterales sub-dichotomi. Flores albo- virescentes, imberbes.

Patria. Nova Hollandia, intra tropicum.

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