264 



Phj^llitis, 5, 7, 8 



Phyllogonium fulgens gracile, 26; vis- 

 cosum, 26 



Phyllophora membranifolia, 100; Bro- 

 diaei, 100, loi 



Physcia adglutinata, 82; aquila, 82 

 aquila detonsa, 82; detonsa, 82 

 caesia, 84; hispida, 82; hypoleuca, 82 

 obscura, 82; obscura endochr5'sea, 82 

 obscura endococcina, 82; pulveru- 

 lenta, 82; speciosa, 82; speciosa galac- 

 tophjdla, 82; stellaris, 82; tenella, 82; 

 tribacea, 82, 169 



Physiaceae, 82 



Physcomitrium turbinatum, 192 



Physma lurida, 88 



Phytolacca decandra, 151, 181 



Phytolaccaceae, 240 



Picea Engelmanni, 59 



Pickett, F. L., 69 



Pilotrichum bipinnatum, 27 



Pinaceae, 230 



Pinus, 160; aristata, 60; edulis, 58, 64; 

 flexilis, 59; Lambertiana, 62, 63; 

 Murrayana, 63; ponderosa, 62-64, 

 116-119; ponderosa scopulorum, 58, 

 59; rigida, 56, 189; Sabiniana, 63; 

 Strobus, 175, 194 



Pisum, 34 



Placodium aurantiacum, 83; auran- 

 tiacum erythellum, 84; cerinum, 83; 

 cinnabarinum, 84; ferrugineum, 83; 

 rupestre, 83; vitellinum, 85 



Placythium nigrum, 88 



Placyrthium, 88 



Plant Breeding in Scandinavia (Re- 

 view), 35 



Plant Societies on Uplands, 167 



Plantae Wilsonianae, 9 



Plantaginaceae, 251 



Platanaceae, 242 



Platanus occidentalis, 151, 161 



Platysma aurescens, 84; Fendleri, 84; 

 glaucum, 84; Islandica, 84; juniperina, 

 84; juniperina Pinastri, 84; lacunosa 

 Atlanticum, 84; lepatizon, 84; Oakesi- 

 anum, 84 



Plumbaginaceae, 248 



Pneumaria maritima, 66 



Poa compressa, 171, 172, 189; pratensis, 



173 

 Podaxon, 17 

 Podostemon, 151 

 Pohlia falcata, 26 

 Polemoniaceae, 249 

 Polyblastea lactea, 83 

 Polyblastiopsis lactea, 94 

 Poh'gala paucifolia, 43 

 Polygalaceae, 244 

 Polygonaceae, 238 



Polygonatum biflorum, 179 



Polygonellaarticulata, 188 



Polygonum fugax, 66; sp., 160 



Polypodiaceae, 229 



Polypodium vulgare, 173 



Polyporaceae, 215 



Polysiphonia elongata, 99, 100; ni- 



grescens, loi; urceolata formosa, loi 

 Polystichum acrostichoides, 177 

 Polytrichum antillarum, 26; commune, 



170; juniperinum, 171; piliferum, 171, 



188; vernicosum, 26 

 Pontederiaceae, 235 

 Pool, R. J., 72 

 Popper, Mrs. A., 69 

 Populus deltoides, 160; grandidentata, 



181, 193; temuloides, 181, 193 

 Poronia faginea, 94 

 Porotrichum sp., 26 

 Portulacaceae, 240 

 Possible Habit Mutant of the Sugar 



Maple (Acer saccharum), A, 140 

 Potentilla argentea, 171; canadensis, 



189; pulchella, 66 

 Prain, D., 18 

 Preliminary List of the Lichens found 



within a Radius of 100 Miles of New 



York Cit^^ 73 

 Proceedings of the Club, 11, 49, 69, 70, 



129, 163 

 Primula borealis, 66 

 Primulaceae, 248 

 Proposed Work on the Cryptogamic 



Flora of the Region About New York, 



133 



Protoboysia, 137 



Prunus corj'mbulosa, 65; serotina, 178; 

 virginiana, 173, 181 



Psedera quinquefolia, 183 



Pseudophyscia aquila, 82; aquila de- 

 tonsa, 82; comosa, 82; hypoleuca, 82; 

 speciosa, 82; speciosa galactophylla, 

 82 



Pseudophyciaceae, 82 



Pseudotsuga, 63, 64; taxifolia, 59, 60, 

 124 



Psora icteria, 89; Russellii, 90 



Psorotichia Schaereri, 93 



Pteridophyta, 229 



Pterigonidium pulchellum, 31 



Pteris aquilina, 102, 103, 173, 177, 189 



Puccinia graminis, 47 



Pucciniaceae, 211 



Punctaria latifolia, 100 



Pycnanthemum virginianum, 173 



Pylaiella littoralis, loi 



Pyramidula, 137 



Pyrenopsidaceae, 93 



Pyrenopsis Schroederi, 93 



Pyrenula cinchonae, 94; hylaspora, 94; 



