470 
Poa megastachya 
— mexicana 
— oxylepis 
— pectinacea 
— reptans 
— subuniflora 
Podosccmum ciliatum 
— debile 
distichophyllum . . . 
gracilc 
mucronatum 
implicatnm 
setosum 
stipoides 
teuellum 
Pogonia mexicana 
Poinciana pulcherrima 
Poinsettia dentata 
— pnlchcrrima 
radians 
schiedeana 
Polanisia uniglandulosa. . . 
POLEMONIACE^E 
Polemonium mexicanum.. 
Polianthes gracilis 
— mexicana 
tuberosa 
Poliomintha marifolia, ..' ' 
POLLICHIE^E 
Pollomate 
Polyactidium delphinifolimn. 
POLYCARPE^E 
Polygala acicularis 
— americana 
~ aparinoides 
berlandieri 
— caracasana 
— confería 
— glochidiata 
— * gracillima 
— greggii 
— longicaulis 
— mexicana 
Polygala michoacana 14 
— obscura u 
— ovalifolia 14 
— ovat ifolia 14 
— pringlei 14 
— púber ula 14 
— riviuafolia 13 
— scoparia 14 
— sub-alata 15 
urightii 14 
POLYG ALE/E 13 
POLYGONACE/E 303 
PoLYCONATEiE 352 
Polygonum acre 304 
aviculare 304 
— lapathifolium . 304 
— mexicanum 304 
— pennsylvani- 
cum 304 
— persicaria 305 
— persicarioides. 305 
— punctatum 305 
Polymnia aspera 14S 
— maculata 148 
— uvedalia 148 
Polypogon ciliatns 393 
— mexicanus 398 
Polypremum linncei 223 
— procumbens 223 
— schlechtcndalii 223 
P OME/E 82 
Ponchishui 173 y 216 
PONTEDERI ACE/E 358 
Pontederia limosa 35S 
Popote de cohete 400 
Popotillo 144 
Populus alba 334 
— fremontii 334 
Poropliyllum coloratum.. . 179 
— erbendbergii. 179 
— filifoliuín 180 
— macrocepha- 
lum 180 
PAíts. 
411 
410 
410 
410 
411 
413 
393 j 
393 
393 
394 
395 
394 
393 
395 
396 
340 
68 ! 
314 , 
316 j 
316 
314 
10 
230 
230 
348 
349 
348 
284 
297 
146 
142 
17 
13 
13 
13 
14 
13 
14 
14 
14 
14 
14 
14 
