Psittacanthus Kerberi — Quercus sessiliflora 



707 



Psittacanthus Kerberi 280 

 Psomiocarpa 30 

 Psora N. A. 12 

 Psoralea piniiata 337 



— tenuifolia 153 

 Psorospennuin 180 

 Psychotria 222 

 Ptaeroxyloii 214 

 Ptelea trifoliata 145 

 Ptericystis 552 

 Pteridium 90, 161 



— aquilinum 20, 85 



— — v<ir. lauugiiiosum 34 



— — var. pubescens 33 

 Pteridophyta 14, 27 

 Pteris N. A. 42 



— aquilina var. crispa* 24 



— cretica 34 



— ensiformis 34 



— longifolia 34 



— macilenta 336 



— multifida 34 



— patens 34 



— pellucida 34 



— quadriaurata 34 



— — var. argyraea 34 



— tremula 34 

 Pterocaetus 102, 330 

 Pterocaulon redolens 250 

 Pteroglossa HO 

 Pterospermum 46 

 Pterostylis 343, 354 



— Toveyana 354 



Pterygopteris Jahansson N. G. 19 

 Pterygota 202 



Ptyssiglottis 237 

 Puccinia graminis 365 

 Pueraria hirsuta 85 

 Pulicaria crispa 177 

 Pulmonaria offlcinalis 565 

 Pulsatilla 72 

 Pultenaea 348 



— fasciculata 353 



— polifolia 353 



— procumbens 353 

 Pycnophyllum 320 

 Pycnostachys 187 

 Pycreus 218 

 Pygeum africanum 206 

 Pyrenacantha 231 



Pyrenacantha malvifolia 207 



— volubilis 235 

 Pyrenaria 254 

 Pyrola chlorantha 105 

 var. convoluta 105 



— — var. paucifolia Fernald* 105 



vor. saximontana Fernald* 105 



Pyxine dissecta (Fee) Worin. 7 



Qualea 305 

 Quararibea 292 



Quercus 92, 95, 98, 101, 131, 137. 139. 

 141, 142, 143, 154, 159, 281, 282 



— sect. Cyclobalanopsis 241 



— sect. Euquercus 241 



— agrifolia 159 



— alba 141, 477 



— arizonica 154 



— banibusifolia 241 



— calliprinos 69, 70 



— chrysolepis 159 



— coccifera 68, 70 



— — var. palaestina Boiss. 68 



— coccinea 128 



— dentata 89 



— Douglasii 154 



— falcata 146 



— Garryana 160 



— glaucoides 280 



— Grahami 280 



— heterophylla 126 



— ilex 62 



— incana 233 



— Kelloggii 159, 160 



— Laceyi 146 



— lusitanica 58 



— — var. maroccana 58 



— lyrata 139, 152 



— marilandica 140. 141 



— niongolica 98 



— Muhlenbergii 139 



— obtusa 148 



— palustris 151 



— pedunculata 17 



— poculifera 280 



— prinus 148 



— rubra 140, 141, 146 



— semicarpifolia 89, 90 



— serrata 85, 241 



— sessiliflora 442 



4.0* 



