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 CONTRIBUTIONS TO THE BOTANICAL MAGAZINE. 675

dnced into his character of the genus. But in an unde- scribed species lately found in Brazil (/. tomentosa, Nob.) they are perfect, consisting of two equal divaricate lobes, as in the greater part of the natural order. This species differs, indeed, from the rest of the genus in its leaves, having constantly a terminal pinna. It agrees with them, however, in all the other characters of the flower, and entirely in the structure of its fruit ; it can therefore be regarded as forming only a section of a strictly natural and well defined genus, still depending on characters not materially different from those proposed for it by M. de Jnssieu ; the only doubtful species being the Jacaranda 2, of Piso, from which the generic name was adopted. Brown.

Bot. Mag. 2327 (1822).

��Brachystelma tuberosa.

Asclepiadea. Corolla campanulata; sinubus angulatis. Colamna inclusa. Corona 1-phylla, 5-fida : lobis antheris oppositis, dorso simplicibus. Antherm absque membrana apiculari. Masses pollinis erectse, basi insertae. Brown MSS.

Brachystelma tuberosa. Brown MSS.

Stapelia tuberosa, Meerb. ic. t. 54, f. 1, Monente D. Aiton.

Mr. Brown, in his valuable treatise on the " Natural Orders of Asclepiadea and Apocincce" published in the first volume of the ' Transactions of the Wernerian Society,' has divided the genus Stapelia, but our present plant will not unite with any of the genera there established ; we are therefore highly indebted to the friendship of this learned botanist, for enabling us to establish the genus of this very rare plant.

Meerburg's figure, above quoted, which was pointed out to Mr. Brown by Mr. Aiton, represents the flower much

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