OF ARTS AND SCIENCES. 77 



a single plant found at a high elevation in the mountains above Gun- 

 mas. (302.) 



Croton Pringlei, Watson. With a minty odor. Ravines and 

 mesas about Guayrnas. (180.) 



Argythamnia sericophylla, Gray. In gravelly waste places 

 about Guayrnas. (108.) 



Argythamnia Neo-Mexicana, Mull. Several forms, all of which 

 appear to belong to this species. Plains and mountain-sides about 

 Guayrnas. (80, 624, 625.) 



Argythamnia Palmeri. Stems numerous, erect, H to 2 feet 

 high, rather sparsely appressed-villous except on the young branches : 

 leaves oblong to lanceolate, acute, more or less attenuate to a very 

 short petiole, entire, 1| or 2 inches long or smaller : flowers apparently 

 dioecious, the pistillate solitary or in pairs in the axils, on recurved 

 pedicels 1 or 2 lines long; sepals 2 lines long, becoming 4 lines in 

 fruit; petals pilose, ovate-lanceolate, shortly acuminate: styles bifid, 

 the stout branches dilated upward and hispid on the inner side : seeds 

 ovate-globose, over a line long, coarsely reticulate-pitted. — High in 

 the mountains above Guayrnas. (247.) 



Manihot angustiloba, Mull. Growing 2 or 3 feet high. In the 

 shade on high mountains above Guayrnas. (233.) 



Acalypha Pringlei, Watson, var., with the pubescence scarcely 

 or not at all glandular, and the teeth of the bracts more numerous 

 (often 13). Mountains above Guayrnas. (219, 262.) 



Tragi a n.epet.efolia, Cav. Hedges about Guayrnas. (63.) — 

 Also var. amblyodonta, Mull. (623.) 



Sebastiania (?) bilocularis, Watson. A shrub or small tic-'. 



sometimes 15 feet high. " Yerba flcche " ; the juice is au exceedingly 



active and violent cathartic, and the fresh bark is used by the Indians 



' to stupefy fish. Common on the shores and in the hills and mountains 



about Guayrnas. (234.) 



Celtis pallida, Torr. A thorny shrub, 6 feet high or more, with 

 orange-colored fruit. Guayrnas. (89.) 



Ficus (Urostigma) Palmeri. A tree 8 to 12 feet high, l)r.m< li- 

 ing near the ground ; young branchletswhite-villous-pul)( >■■• lit : leaves 

 at first densely white-tomentose beneath, becoming Dearly equally 

 green on both sides and finely pubescent or suhglabrous above, rather 

 thick, ovate, with a somewhat cordate or roundel base, acute, '■> inches 

 long by 2 or 2^ broad, on petioles an inch long: fruit in pairs in the 

 axils, on stout peduncles 6 lines long, globose thick and fleshy, <'■ lines 

 in diameter, subtended by an irregular disk like involucre '■> lines 



