CONTRIBUTIONS TO THE BOTANICAL MAGAZINE. 675 



duced into his character of the genus. But in an un de- 

 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 

 Jussieu ; the only doubtful species being the Jacaranda 3, 

 of Piso, from which the generic name was adopted. 

 Brovm.. 



Bof. Mag. 2327 (1822). 



Brachystelma tuberosa. 



Asclepiadea. CoroUa campanulata; sinubus angulatis. 

 Columna inclusa. Corona 1-phylla, 5-fida : lobis antheris 

 oppositis, dorso simplicibus. Aniherce absque membrana 

 apiculari. Masses pollinis erectse, basi insertse. Brown 



M8S. 



Brachystelma tuberosa. Brown MSB. 



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



Alton. 



Mr. Brown, in his valuable treatise on the "Natural 

 Orders of Asclepiadea and Afocinea," 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 estabhshed ; 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. Alton, represents the flower much 



