XIV ILLUSTRATIONS. 



Page. 



Fig. 360. Distribution of P. bostii molle 320 



361. P. obtusum 321 



362. Distribution of P. obtusum 322 



363. P. hemitomon 323 



364. Distribution of P. hemitomon 324 



365. P. ciliatissimum 324 



366. Distribution of P. ciliatissimum 325 



367. P. zizanioides 326 



368. P. gymnocarpon *- 327 



369. Distribution of P. gymnocarpon 328 



370. P. decolorans , 328 



