DB. A. GBAY OS NISSOLIA. 25 



b. Folia angusta (j— £ ad J-f unc. longa), marginibus revolntis. 



1. Capitula (4-7) subcorymbosa ; pedunculis £-1 unc. longis. 



51. E. paucidentata (Steetz). 



2. Capitula solitaria ; pedunculis 3-5 unc. longis. 



52. E. ciliata {Benth.). 



Note on the Species of Ifissolia. By Asa GtEay, M.D., F.M.L.S. 



[Read March 15, I860.] 



In the ' Flora Brasiliensis,' Mr. Bentham has reduced the three 

 species of Nissolia proper to one (the If. fruticosa, Jacq.), and in a 

 foot-note has briefly characterized a second species, If. platycarpa, 

 from Coulter's Mexican collection. The latter is, as I suppose, 

 the plant which, before the fruit was known, I had described under 

 the name of Chcetocalyx Wislizeni*, and afterwards, on receiving 

 the fruit in "Wright's second New Mexican collection, had still left 

 in that genus, because the fruit of DeCandolle's genus (at least, of 

 the original species) still remained unknown. 



More recently, Dr. Torrey has described and figured another 

 North Mexican species, nearly related to C. WisUzeni, but different 

 in several particulars, — among others, in the calyx-teeth, unless 

 these should vary here as they appear to do in If. fruticosa. The 

 species tben are : — 



1. N. fruticosa, Jacq.; Benth. in Fl. Brasil., Legum., p. 77, t. 19. 

 This is No. 194 of Fendler's Venezuelan collection, in fruit. 



2. N. platycarpa, Benth. I. c. Calycis dentibus subulatis tubum sub- 

 scquantibus; legumine piano longitudinaliter 1-costato, articulis 

 quadratis distinctis, ala samaroidea rectiuscula articulis latiore et 2-3- 

 plo longiore. 



3. N. Wislizeni, A. Gray. Ilerbacea, puberula; foliolis rotundatis 

 subreticulatis ; calycis dentibus subulatis tubo brevioribus ; stamini- 

 bus diadelphis (9 et 1); legumine piano longitudinaliter 3-5-nervi, 

 articulis quadratis oblongisve distinctis, ala samaroidea parvula ssepius 

 recta articulis parum latiore. — Chcetocalyx WisUzeni, Gray, PI. Wright, 

 i. p. 51, and ii. p. 45 ; Torr. Bot. Mex. Bound, p. 56, t. 18. f. 5-7. 



* Although Dr. Gray is quite right in referring his Chatocalyx Wislizeni to 

 Nissolia, it proves on comparison to be distinct from N. platycarpa, both in 

 the venation of the pod and in the terminal wing, which is very much smaller. 

 I have therefore inserted, abovo, a somewhat fuller diagnosis of my N. platycarpa. 

 — Oh Bentham. 



