Cactales.] 



LOASACE.E. 



745 



Except the stinging property which I'esides in the hairs of some species, little is 

 known of the qualities of these plants. Mentzelia hispida, a Mexican herb, is said to 

 have a purgative root. 



GENERA. 



II. Gronovie.'e. 



I. LOASE.E. 



Acrolasia, Presl. 

 Mentzelia, Linn. 



Creolobus, Lilja. 



Chri^soitoma, Lilja. 



Trachpphytum , Nutt 



Rartonia, Sims. • Cajophora, Prcsl. 



Klaprothia, //. B. K. Raphisanthe, Lilja. 



Sclerothrix, Presl. Blumenbachia, Schrad. 



Grammatocarpus, Presl. ? Gj-mnotheca, Decaisne. 



Sci/pha7^thus, Dou. ? Sphenantha, Schr. 

 Loasa, Adans. \ 



Numbers. Gen. 15. Sp. 70. 



Cevallia, Lagasc. 



Petalanthera, Torr. 

 Mackaya, Arn. 

 Gronovia, L. 

 Fissenia, R. Br. 



CucurhitacecB. 

 Position. — Homaliacese. — Loasace.e. — Cactacete. 

 Onar/racecB. 



Fig. CCCCXCVIL* 



Fig. CCCCX<VI1 - Loasa Pentlamlica. 



