634 INDEX OF THE GENERA AND SPECIES 



WINDSORIA 



73 



XYRIS 



12 



May§ 



94 



pomformi* 



— 



anceps 



— 



ZIZANIA 



92 



seslerioides 



— • 



caroliniana 



— 



aquatica 



93 



WOODSIA 



579 



JUXUOBCL 



— 



clavulosa 



.- 



ilvcnsis 



— 



jupicai 



— 



palustris ? 



— 



Perriniana 



580 



ZAPANIA 



604 



ZIZIA 



185 



XANTHIUM 



477 



lanceolata ? 



— 



aurca 1 





spinosum 



478 



nodiflora 



— 



cordata 



186 



etruraarium 



477 ZEA 



93 



integerrima 



187 



