259 



POMACEAE. 7, 149, 155, 170; 9, 32, 40. 



Populus Toiirn. 6,103,456; 7, 166, 167, 169,225,257-240, 379-381; 



8, 188; 9, 110-111; 22, 114; 25», 92. 



— alba L. 2, 314; 3, 10; 7, 167, 169, 175, 301, 379 et v.; 9. 110; 



10, 153, 220; 11, 69; 14, 83, 89; 21, 242; 22, 147; 25, 278. 

 V. genuina Wesm. 7, 237, 379. 



— angulata Ait. 9, 110. 



— balsamifera L. 9, 111 ; 10, 221 . 



— canadensis Desf. 3, 9; 7, 167, 168, 175, 180 et v.; 9, 111 ; 10,221. 



— candicans Ait. 7, 167, 169, 175; 9, 111. 



— canescens Sni. 1, 127 v. glabrescens Dmrl.; 3, 296; 7, 301, 379; 



9, 110; 21, 242; 22, 85 v. glabrescens Dmrt., 147. 



— grandidentata Mchx. 9, 110. 



— italicaMônch. 6, 215,217;7, 175; 9, 111 ; 21, 242; 25, 255. 



— laurifolia Ledeb. 9, 111. 



— mexicana Wesm. 6,380. 



— monilifera Ait. 3, 9-14 et v. erecta de Séiys ; 7, 380; 9, 111 ; 22, 147. 



— nigra L. 1, 127 v. dunensis Dmrt.; 2, 314; 3, 13 ; 7, 168, 175, 237- 



259 et V. ^emana Wesm., 301, 380; 9, 111 ; 10, 218, 220; 11, 69; 

 14, 83; 21, 242; 22, 147; 24, 26, 42; 25, 255. 



— pyramidalis Rozier. 2, 514; 3, H ; 7, 301, 380; 14, 65, 83. 



— tremula L. 2, 514; 3, 255; 7, 168, 169, 175, 259, 501, 579 et v. 



genuina et villosa Wesm.; 10, 85, 220; 13, 259; 14, 85; 20, 166; 

 21,242; 22,55,147; 23,202. 



— tremuloides Mchx. 9, 110. 



— villoia Lang. (P. mferwedia Alérat). 18», 52-53; 22, 85. 

 Toroniapunctata Fr. 1, 128; 25, 170. 



Porphyra laciniata Ag. 5, 35. 



— vulgaris Kiitz. 5, 55. 



Porphyi'idium cruenlum Naeg. 24^, 122; 25^, 114. 



Posidonomya Becheri 16, 182. 



Portulaca oleracea L. 9, 69 ; 14, 75. 



PORTULACEAE. 9, 52, 59. 



POTAMEAE. 9, 57. 



Potamogeton L. 7, 569; 9, 405; 10, 259. 



— acutifolius Link. 1, 206; 2, 155, 542, 545 ; 3, 46, 148; 4, 50, 178; 



5, 254, 401 ; 7, 275, 504; 10, 21 ; 12, 25; 15, 159; 22, 86,96, 

 150, 187; 24, 360; 24% 36, 52. 



