Polypodiacee, - - - ~ = go, 129 
Polypodium falcatum, = - = a 30; 57, 70,08 
—scouleri, = = < = = 30, OI 
—munitum, - = = - = 90 
Polystichum munitum, = - - 45, 54, 59, 71, 129 
Populus deltoides, = = = = = 59 
Porella navicularis, - - = - = yeaa 
—platyphylloidea, - - = = 231 
—rivularis, = = - - = = Axi 
—Roellii, - = 2 = a 2 233 
Port Renfrew, - = = - = 277, 307, 319 
Postelsia, - = - - - - - 338 
Potamogeton natans, = = = = = 74 
—pusillus, = - - - - - - 74 
Potentilla villosa, - - = = . = 25 
Providence Cove, - - : - 307, 312, 327 
Prunella vulgaris, . - = - = = 26 
Pseudolarix, - = = - = = ee IT 
Pseudotsuga, — - - - - 58, 50, 164, 180, 209, 210 
—Douglasil, - . - - - 53 
—taxifolia, - - - - - 55, 129 
Pteridophyta, - - = - = 89, 129, 131 
Pterygophora, - - - - - - - 12 
Ptilidium californicum,  - - = = r- 233 
Radula Bolanderi, = - - - - 230, 233 
—complanata, - = - Eee 230 
—spicata, - - - - = -- 230 
Ranunculacee, - - = = - - 108, 130 
Ranunculus bongardi, = - - - 30, 46, 109 
—intermedius, - - = = -- 67, 109 
Razoumofskya tsugensis, - - = - 46, 86, 107 
Renfrewia parvula, - 247, 251, 271, 272, Plates X VI.— XIX. 
—parvula perlonga, - = - = 265, 271, 272 
—solidungula, - - = - =S 270 
—yezzoensis, - . = - = 2708271 
Rhizinia inflata, - - - = - =) ali 
Rhizinacee, - = - = = - 238, 241 
Rhodophycee, - - = = = = 12 
Ribes bracteosum, = - = - i 112 
lacustre, - - - - - = he 
