OP ARTS AND SCIENCESo 379 



important explorations in more eastward Mexican States, one in 

 the year 1878, in connection with Dr. Parry, with headquarters 

 at San Luis Potosi, the other in 1879 and 1880, in Nuevo Leon and 

 Coahuila. Mr. Pringle is now returning to this promising field, 

 making the town of Chihuahua his startiag point, and with the 

 hope of passing the summer in the Sierra Madre lying to the west 

 of that place. 



Having now determined the Gamopetalce of these two collections of 

 1885, I here bring together some account of the new and otherwise 

 noteworthy species. The numbers following the name of the collector 

 are those under which the specimens are distributed. The specimens 

 of Mr. Priugle's distribution are accompanied by full printed tickets. 



Rubiacece. 



CouTAREA LATiFLORA, DC. Prodr. iv. 350. " A large shrub, 

 about ten feet high, rather compact, with several stems and very green 

 leaves : in the canons and mountains above Batopilas," Palmer, H. 

 Called " Copalquin," and the bark much used as a substitute for 

 quinine, &c., according to Dr. Palmer. The specimens are in fruit 

 only, the long and narrow calyx-lobes marcescent on the younger 

 fruits. They answer well to the figure of Mo^ino and Sesse, even to 

 the " tuberculis sparsis " on the capsule, although these slightly-raised 

 and light-colored spots, as well as the ribs, are exaggerated in the rude 

 sketches. The seeds are as represented, and very broadly winged. 

 The popular name, as recorded by Dr. Palmer, nearly agrees with the 

 " Copalchi " of the Prodromus. 



HouSTONiA POLTPREMOiDES. ^mco^is, ^ acerosffi maxime affiuis, 

 at parum fruticulosa, laxius ramosa, spithamtea ; foliis setaceo-subu- 

 latis minus crebris ; floribus plerumque pedunculatis ; corollas (lin. 4 

 longae) tubo calycem pauUo superante. — Santa Eulalia Mountains, 

 near Chihuahua, on gravelly limestone slopes. Corolla " white, 

 changing to purple." Pringle, 16 and 356. 



Randia Pringlei. Inermis ; foliis ovalibus pube molli densa 

 subcinereis subtus reticulatis basi in petiolura marginatum contractis ; 

 stipulis parvulis triangulari-subulatis ; floribus in glomerulos sessiles 

 terminales vel in axillis summis congcstis ; calycis lobis subulatis tubo 

 supra ovarium crateriformi longioribus ; corolla hypocraterimorpha ; 

 tubo extus puberulo vix semipollicari lobis ovatis acuminatis parum 

 longioribus ; styli ramis brevibus discretis sursum incrassatis truncatis ; 

 ovarii biloculari, placentis in axi leviter counatis ; fructu fide Pringle 

 vetustate globoso pollicari, pericarpio fragil-i semiiiil)us planis farcto. 



