Plate 2580. 



ERYNGIUM TENUISSIMUM, Hemsl 



UMBELLIFERiE. 



E. tennissimum, ILmsl. ; E. tenue, Hook el Am. Bot, Beech. Toy. p. 



293, non Lam. ; ab omnibus speciebus mexicanis exiguitate recedit. 



Carries gracillimi, erecti, subsimplices, circiter 6 poll. alti. Folia 

 radicalia ignota, caulina rigida, glabra, angusta, aculeato-dentata, 

 ssepius supra medium trilobata. Capitula ovoidea, cum bracteis cir- 

 citer 3-4 lin. diametro, in axillis foliorum superiorum solitaria, 

 breviter pedunculata. Involucri bractese atque palese rigidie, lineari- 

 * subulate, flores clistincte superantes. Sepala oblonga, apiculata. Petala 

 apice tridentata. Ovarium squamis parvis vestitum. Fructus ignotus. 



Mexico : Jalisco, Beechey. 



This species was founded on the single specimen here figured, and I 

 have seen no specimen in the various herbaria I have examined that 

 I could refer to it. E. tenue, Hook, et Arm, is referred to E. 

 Wrightii, A. Gray, in the Index Kewtnsis, but it does not appear 

 on what authority this reduction was made. It may possibly be a 

 starved state of some species, though I have been unable to discover 

 the connection. It certainly is not the Texan E. Wrtqhtii.—W. 



BOTTING HEMSLEY. 



Fig. 1, a bract ; 2, a flower ; 3, a petal. All enlarged. 



