of the Class Composite. 253 
and having imperfect stamina. The florets of the female capi- 
tulum differ in the disposition of their laciniz ; for in the central 
ones the limb is regularly five-cleft, whereas in those of the cir- 
cumference it is somewhat bilabiate, the inner segment being 
more deeply separated than the rest. The two sexes of this 
plant might be readily mistaken for two distinct genera. "The 
Atractylis mexicana of Linnzus I have ascertained to be the 
male sex of a third species of this genus. Of this interesting 
plant, for which I propose the name of Diazeuzis Mutisiana, I 
have had an opportunity of examining the original sample in 
the Linnzan herbarium. 
1. D. érinereino foliis lanceolatis aguminatis triplinerviis, floribus 
‘solitariis. ` int Postao teen) 
| AMET trinervis. Herb. 7 et p. 
In Guayaquilà Peruvianorum. Tafalla.y. 
Frutes erectus, ramosus, niveo-lanatus, sempervirens, omnium 
-© speciosissimus. Rami teretes, striati, lanugine alba fugaci 
vestiti. Folia alterna, breviter petiolata, lanceolata, acu- 
; minata, margine denticulis plurimis acutis ornata, nunc 
. raró integerrima, 5-nervia, nervis lateralibus extimis fere 
obsoletis, hinc quasi triplinervia, membranacea, basi ob- 
tusá, suprà denudata, leté viridia, et lucida, subtüs lana 
implexà copiosissimá niveà, demüm fulvescenti, vestita, 
3—5-pollicaria, oaa v. iine epe lata. Petioli is 
feminei n na ine e! ge E : 
|. metro ie: masculi e minores. Cetera omnind 
utin charactere generico. : 
