INDEX TO THE SPECIES. 



Page. 



aboriginum 66 



acutifolia 68 



ambigens 69 



angustifolia 50 



antonina 59 



aptera 76 



aquilina 57 



argentea 71 



attrita 65 



betulifolia 64 



brevistylis 7:> 



bullata 75 



cinnamomea 71 



coahuilensia 61 



cognata 62 



confinis 71 



crenata 63 



crenulata 74 



cuspidata 62 



cycloloma 75 



elegans 7 J 



[ormosa 59 



glauca 64 



isophylla 58 



jucunda 63 



laetissima 69 



1 in iila 66 



hiteacens 72 



megacarpa 68 



mesochora 58 



monticola 64 



ta Ti 



neo in. xicana 



oitens To 



nitida 71 



Qucifera 75 



obscura 76 



obtusata 



ovalifolia 7:; 



padifolia 67 



pallida 7U 



parvula 64 



persicifolia 67 



polyadenia 65 



prominula 58 



pumila 61 



rhombifolia 59 



saligna 7:; 



sancta 63 



scutellata 62 



similis 65 



straminea 70 



subintegra 61 



subvestita 67 



tortuosa 60 



toxicodendron 



triptera 71 



undulata 62 



verrucosa 69 



villosula 60 



wrightiana 58 



i 



