460 



INDEX 



Placodium pyraceum Anzi, 369, 377 



P. rupestre Br. and Rostr., 301 



P. subfruticulosum Elenk., 347 



P. sympageum, see P.flavescens 



P. tegularis (Ehrh.) Darbish., 379, 384 



P. teicholytum DC., 369 

 Placodium Hill (non DC.), 8 

 Placodium Web. (non DC.), 9 



P. Garovagli (Koerb.) Fried., 8 1 



P. saxicolum S. . Gray, 146, 168; see 



Lecanora 



Placolecania Zahlbr., 338 

 Placothelium Miill.-Arg., 285, 319 

 Placynthium Ach., 336 



P. nigrum S. F. Gray, -248, 373 

 Plagiothecium sylvaticum Buch. and Schimp. , 



237 



Plagiotrema Miill.-Arg., 317 

 Platygrapha Nyl. , 325 

 Platysma Nyl., 8, 200, 257; see Cetraria 



P. commixtum Nyl., 375 



P. corniculattim Hill, 8 



P. Fahlunense Nyl., 375 



P. glaucum Nyl., 10, 375, 376, 418 



P. laciinosa Nyl., 375 

 Pleospora collematnm Zuk., 163, 266 

 Plenrococcus Menegh. (?), 22, 29, 62 



P. Naegeli Chod., 28 



P. vulgaris Menegh., 28, 55 (Fig. 22), 233 



P. vulgaris Naeg., 28 

 PJeurocybe Miill.-Arg., 320 



P. madagascarea A. Zahlbr., 289 

 Pleurothelium Miill.-Arg., 317 

 Plenrotrema Miill.-Arg., 317 

 Plot, 4 



Plowright, 207 

 Plukenet, 5 

 Poa compressa L., 393 

 Podttridae, 256 

 Polyblastia Massal., 48, 314 



P. catalepta (Ach.) Fuist., 30 



P. Vouauxi Lesd., 378 

 Polyblastiopsis Nyl., 316 

 Polycauliona Hue, 339, 340, 346 



P. regale Hue, 339, 346 

 Polycaulionaceae, 339 

 Polychidium A. Zahlbr., 784, 332 

 Polycoccus Kiitz., 24 



P. punctiformis Klitz., 24, 54, 6 1 

 Polypori4s Mich., 261 

 Polystictns versicolor (Fr.), 152 

 Poly stigma nibrum DC., 178, 207 

 Polystroma Clem., 326 



P. Ferdinandezii Clem., 326 

 Polytrichum L., 392 



P. commune L., 237 

 Polyxenus, 270 

 Porina Ach., 204, 316 



P, lectissima A. Zahlbr., 249, 251, 392 



P. olivacea A. L. Sm., 159 (Fig. 90 A) 

 Porocyphus Koerb., 332 

 Poronia Willd., 13, 178 

 Porta, 5 



Porter, 109, 270 

 Prasiola Ag., 60, 309, 315 



P. parietina Wille, 60 (Fig. 33) 

 Prasiolaceae, 60 



Propagula, 1 1 



Protocaliceaceae, 277 



Protococcaceae, 55, 288, 291, 309, 310, 313 et 



M?-> 353. 3 6 3 

 Protococcus Ag., xx, 28, 56, 62, 63, 65, 287 



P. botryoides Kirchn., 65 



P. viridis Ag., 22, 28, 44, 48 (Fig. 15), 55 



(Fig. 22), 65,313 

 Pseudopyrenula Mull.-Arg., 316 

 Psocus, 397 



Psora (Lecided) decipiens Hook., 388 

 Psorella Mull.-Arg., 329 

 Psoroglaena Miill.-Arg., 315 

 Psoroma S. F. Gray, 136, 285, 286, 335 



P. hypnorum S. F. Gray, 63, 81, 88, 89, 135, 



246, 283, 370 



Psoromaria Nyl., 285, 286, 335 

 Psorotichia Massal., 68, 163, 333, 373 



Ps. lugubris Dal. Tor. and Sarnth., 375 



Ps. lutophila Arn., 368 

 Psychides, 399 

 Pterygiopsis Wain., 332 

 Pterygium Nyl., 333 



Pt. Kenmorensis A. L. Sm., 392 

 Ptychographa Nyl., 321, 322 

 Pulteney, 4, 14 

 Pulvis antilyssus, 407 

 Pulvis Cyprius, 419 



Pycnothelia ( Cladotiia) papillaria Duf. , 369 

 Pyrenastrum Eschw., 317 

 Pyrenidiaceae, 53, 54, 275, 285, 309, 319 

 Pyrenidium Nyl., 285, 319 



P. actinellum Nyl., 99 

 Pyrenocarpeae, 158, 273, 308 

 Pyrenocarpei, 306, 307, 353 

 Pyrenocarpineae, 273, 275, 288, 308 

 Pyrenocollema Reinke, 334 

 Pyrenographa Miill.-Arg., 323 

 Pyrenolichens 159, 241, 276, 352, 391 

 Pyrenomycetes 158, 267, 273 

 Pyrenopsidaceae, 282, 284, 310, 352 

 Pyrenopsidium Forss., 333 

 Pyrenopsis Nyl., 60, 68, 163, 175, 333 



P. haematopis Th. Fr., 195 



P. impolita Forss., 175 



P. phatococca Tuck., 175 

 Pyrenothamnia Tuck., 99, 315 



P. Spraguei Tuck., 288 

 Pyrenothamniaceae, 309, 315 

 Pyre not hea Ach., 192 

 Pyrniothrix Riddle, 319 

 Pyrenula Ach., 200,' 316 



P. cinerella Fink, 365 



P. leucoplaca Koerb., 365 



P. nitida Ach., 174, 194, 240, 255, 350, 354, 



364, 3 6 5 



P. thelena Fink, 365 

 Pyrenulaceae, 50, 276, 309, 316, 365 

 Pyrgidium Nyl., 319 



P. bengalense Nyl., 353 

 Pyrgillus Nyl., 289, 320 

 Pyronema Carus., 167 



P. confluens1v\., 178 

 Pyxidium Hill, 8 

 Pyxine Nyl., 301, 341 



P. Cocoes Nyl., 353 



P. Meissnerii Tuck., 353 



