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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