424 PHANEROGAMIA. 



2. ZORNIA RETICULATA, Smith. 



Zornia reticulata, Smith, 1. c ; DC. Prodr. 2, p. 216. 

 Hedysarum diphyllum, var. /3. Linn. ; Swartz, Obs. Bot. p. 28. 



Hab. Brazil, in the vicinity of Rio Janeiro. 



These two species, together constituting the Hedysarum diphyllum 

 of Linnseus, are probably to be reunited, under the name of Z. 

 diphylla, Pers., as is done by Yogel, and recently by Bentham (in 

 Kew Jour. Bot. 4, p. 45). One belongs to the Old, the other to the 

 New World ; but the characters that distinguish them are not of much 

 value. 



51. STYLOSANTHES, Linn. 



1. Stylosanthes viscosa, Swartz. 

 Hab. Brazil, around Rio Janeiro ; where it is very common. 



2. Stylosanthes Guianensis, Swartz. 

 Hab. Brazil ; with the preceding species. 



52. A R AC HIS, Linn. 



1. Arachis hypog^ea, Linn. 



Hab. Singapore : probably escaped from cultivation. — It is uncer- 

 tain whether the Pea-nut is a native of Africa or of Equinoctial 

 America. Mr. Bentham inclines to the latter opinion, adducing the 

 fact that the other known species of the genus, five in number, are 

 all Brazilian. 



