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 ON THE ASCLEPIADEiE. 217

Habitus. Frutices v. suffrutices erecti. Folia oppo- tss sita, margin© ssepe revolutse. Umbellce interpetiolares. Patria. Africa Australis.

Obs. Asclepias arborescens, fruticosa and setosa, are the three certain species of this genus ; but A. crispa has pro- bably the same structure. The flowers I have examined, but have not seen the fruit. A. pubescens ought probably to be altogether omitted ; for, according to the description and specimen in Linnaeus's Herbarium, it is A. arborescens, while according to the reference to Plukenet, it is A. crispa. This observation I have copied from Mr. Dryancler's notes.

��XYSMALOBIUM. [Asclepiadis sp. Linn.

Char. Corolla 5fida, patens.

Corona staminea summo tubo filamentorum imposita, simplici serie decempartita, laciuiis 5 antheris oppositis carnosis, subrotunclis, intus simplicibus ; 5 reliquis nanis.

Anther (B membrana terminate.

Massce pollinis compressor, apice affixae, pendulae, pro- cessubus connectentibus latiusculis.

Stigma muticum.

Follicidi ventricosi, ramentacei. Semina comosa.

Habitus. Frutices erecti. Folia opposita. Urn- cso bellce interpetiolares. Flores majusculi, limbo nunc bar- bat o.

Patria. Africa Australis.

Obs. This genus at present consists of only two species, Asclepias undidata and graiidiflora.

��CALOTROPTS. [Asclepiadis sp. Linn.

Char. Corolla sub-campanulata, tubo angulato, angulis intus saccatis, limbo 5partito.

Corona staminea 5phylla, foliolis carinaeformibus, tubo filamentorum longitudinaliter adnatis, basi recurva.

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