ACT 
1924] Index 
167; italicum, 167; pennsylvani- 
cum, 167; spinosum, 168; stru- 
marium, 168; Wootoni, 168. 
Xyris caroliniana, 37; flexuosa, 180. 
Zizania, 153, 154, 155; A Study of 
the Genus, 153; aquatica, 153, 
154, 155, 156, 157, 158, 159; var. 
462 
249 
clavulosa, 156; dahurica, 158; 
effusa, 156; fluitans, 159; lati- 
folia, 156, 158, 159; lenticularis, 
159; microstachya, 159; miliacea, 
159; natans, 159; nutans, 159; 
palustris, 153, 154, 155, 156, 
157, 158, 159; Retzii, 159; sub- 
tilis, 159; terrestris, 159. 
angustifolia, 156, 157; var. brevis, Zizaniopsis bonariensis, 159; mic- 
156, 157; var. interior, 156, 158; 
rostachya, 159; miliacea, 159. 
var. latifolia, 159; aristata, 159; Zostera marina, 219. 
bonariensis, 159; ciliata, 159; Zygnema, 161, 212. 
