390 
Pentacraspedon, 84. 
Pentameris, 99. 
Pentapogon, 91. 
Pentaschiste, 99. 
Pentatropis spiralis, 177. 
Penthea, 342; atricapilla, 236, 344; 
filicornis, 344; filiformis, 236 ; mela- 
leuca, 236, 344; minor, 344; obtusa, 
236, 344; patens, 236, 344; reflexa, 
236, 344; triloba, 344. 
, habit and struct., 236. 
Periballia, 95. 
Perieilema, 83. 
Periploca hydaspides, 140, 176. 
Perobachne, 74. 
Perotis, 63. 
Pertya Aitchisoni, 173. 
Petaloides (Afghan), 187. 
Peyritschia, 96. 
Pfeffer’s views on cell-sap, 265. 
Phacelura, 68. 
Pheecasium lampsanoides, 173. 
Pheenosperma, 59; globosa, 59. 
Pheochloa, 127. 
Phagnalon niveum, 169, 
Phalaridese, 75; diagn., 30. 
Phalaridium, 116. 
Phalaris, 75, 76, 84; americana, 76; 
arundinacea, 76; canariensis, 76, 
245; crypsoides, 84; intermedia, 
76; Michelii, 85; minor, 142; para- 
doxa, 76 ; trigyna, 85. 
Phalona, 115. 
Pharus, 51. 
Phaseolus Mungo, 160. 
Phippsia, 85, 86. 
Phleoidese, (diagn.) 30, 83. 
Phleum, 57, 84, 85, 142; tenue, 85. 
Phlomis lamiifolia, 184. 
Phoenix sylvestris, 140; dactylifera, 
140 
Pholiurus, 68, 132. 
Phragmites, 112, 142; communis, 193. 
Phyllanthus compressus, 243. 
Phyllorhachis, 50. 
Physalis minima, 180. 
Picea (Arctic), 135, 137. 
Pimpinella, 164 ; tripartita, 164. 
Pinguicula, act. carb. ammon. on, 276. 
Pinus (Arctic), 135; excelsa, 144; 
halipensis, 143, 144, 187 ; ($ Tsuga) 
Hookeriana, 212; longifolia, 142, 
143, 187; ($ Tsuga) Pattoniana, 212 ; 
sp., 135. 
Piptatherum, 17, 81 ; sp., 191. 
Piptochetium, 82. 
Pistacia integerrima, 142, 156; mutica, 
156, var. cabulica, 156 ; sp., 156. 
Pisum sativum, 147, 160. 
Plagiolytrum, 105. 
INDEX. 
Plagiosetum, 49. 
Plagiostachya, 117. 
Planotia, 109. 
Platylepis, 24. 
Platystachya, 118, 123. 
Pleopogon, 83. 
Pleuraphis, 61, 62; Jamesii, 62; mu- 
tica, 62 ; sericea, 62. 
Pleurococcus Bradypi, 9; Cholopi, 9. 
Pleuroplitis, 68. 
Pleuropogon, 121. 
Pleurospermum,147 ; n. sp.?, 164 ; pul- 
chrum, 164. 
Plintanthus, 99. 
Pluchea lanceolata, 169. 
Plunıbaginese (Afghan), 175. 
Poa, 89, 108, 116, 121, 124, 125, 126; 
albida, 125 ; alpina, 89; annua, 193; 
chilensis, 125; lanuginosa, 124, 125 ; 
mucronata, 117; persica, 124; pra- 
tensis, 124; sicula, 122, 123. 
Poaces, (diagn.) 30, 32, 36, 75. 
Podagrostis, 91. 
Podophorus, 128. 
Podosemum, 83. 
Pogonantherum, 64; contortum, 67. 
Poidium, 125. 
Poinsetta pulcherrima, 243. 
Polanisia viscosa, 152. ` 
Pollinia, 65, 66, 67, 73; articulata, 
67 ; aurea, 67; eriopoda, 67; gla- 
brata, 67; filifolius, 67; imberbis, 
67 ; lancea, 67 ; longisetus, 67; nuda, 
67; versicolor, 67; Willdenowianum, 
Polyantherix, 133. 
Polygonacese (Afghan), 185. 
Polygonatum multiflorum, 189. 
Polygonum aviculare, 185, var. bistorta, 
146, 185 ; cognatum, 185 ; flaccidum, 
185; prostratum, 286; sp., 185. 
Polyodon, 105; distichum, 105. 
Polypetalæ (Afghan), 148. 
Polypodium affine, 296; dareæforme, 
291; linguæforme, 296; nigrescens, 
296. 
Polypogon, 19, 58 ; elongatus, 59. 
Polyporus pinicola, 194. 
Polyrhaphis, 109. : 
Polystachya capensis, 338; Gerrardi, 
338; Lindleyana, 338; pubescens, 
338 ; Sandersoni, 338; similis, 338. 
Polytoca, 52; bracteata, 52; macro- 
phylla, 52; Wallichiana, 52. 
Pommereulla, 109. 
Ponceletia, 50. : 
Populus (Arctic), 138; sp. near tre- 
mula, 138. 
Porroteranthe, 126. 
Potamochloa, 55. 
