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 210 ON THE ASCLEPIADE/E.

28] TYLOPHORA.

Char. Corolla rot at a, 5partita.

Corona staminea 5phylla, foliolis clepressis, carnosis, angulo interiori simplici edentulo.

Anther m membrana terminatse.

Massce pollinis erectae, basi affixae, marginibus simplicibus.

Stigma muticum.

Folliculi laeves. Semina comosa.

Habitus. Herb a v. suffrutices volubiles. Folia opposita, membranacea, plana. Umbellce interpetiolares. Flores utplurimum parvi.

Patria. Nova Hollandia, praesertim intra tropicura, sed usque ad grad. 33. lat. aust. India Orientalis, et Africa aequinoctialis. Octo species nobis cognitae, quarum nullae adhucdum editae sunt.

MARSDENIA.

Char. Corolla urceolata, 5fida, nunc subrotata.

Corona staminea Sphylla, foliolis compressis, indivisis, intus edentalis.

Anther a membrana terminatse.

Massce pollinis erectae, basi affixae.

Folliculi laeves. Semina comosa.

Habitus. Suffrutices saepius volubiles. Folia opposita, latiuscula, plana. Cymm, nunc Thyrsi, interpetiolares.

Stigma saepius muticum, quandoque rostratum, rostro indiviso vel bificlo.

29] Patria. India Orientalis et Nova Hollandia ; rarius in America Meridionali, et Syria.

Obs. This genus differs from Pergularia, chiefly in the want of the inner laciniae of the corona : it is therefore an arbitrary separation, and made principally to obtain clearer characters for both. The two species, with an elongated stigma, are perhaps not truly of this genus, but if separated from it, must form each a distinct genus.

It is named in honour of William Marsden, Esq.,

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