Index 



655 



Populus — continued. 

 nigra, 204. 



italica, 204. 

 tremuloides, 43, 131. 134, 152, 207, 314, 



315, 339. 341. 35«, 579. 599- 

 Portulacaceae, 155. 



Potamogeton. 319, 320. 346. 388, 396, 399, 

 401. 411. 504. 

 foliosus niagarensis. 320. 354. 

 natans. 319. 321. 345, 354. 

 spp., 320. 321. 

 zosterifolius, 577, 503. 

 Potatoes, 12. 

 Potentilla, 285. 



anserina, 268, 269, 272. 274, 275, 276, 

 277, 278, 279, 280. 284, 286, 290, 335, 

 339. 344- 

 argentea, 157. 

 arguta. 119, 126, 157, 301, 303. 305, 



313. 338, 360. 

 canadensis, 125, 126, 157, 602. 

 fruticosa. 286. 290. 295, 297, 300, 301. 

 303, 308, 31 r, 317, 330. 334. 335. 337, 

 339. 34^. 343. 344. 346. 3^. 

 monspeliensis, 602. 

 palnstris, 323. 324, 333. 360, 602. 

 Prenanthes allia, T28, 134. 170. 314. 368. 



racemosa, 338, 342, 368, 610. 

 Prickly Pear. 54. 77, 363. 

 Primrose, Evening, 278, 295, 317. 363. 

 Primulaceae. 163, 363, 605. 

 Prince's-feather, 369. 

 Privet, Swamp, 211. 

 Proserpinaca palnstris, 323. 324, 326, 363, 



579, 589. 604. 

 Protozoa, 319. 499. 502, 506, s^7- 5i3. 



524. See also Flagellata. 

 Prunella vulgaris, 305, 315, 332. 33s. 339. 



364, 606. 

 Prunus, 205, 342, 343. 

 angustifolia, 209. 

 chicasa, 209. 

 demissa, 209. 

 hortulana, 209. 

 nigra, 209. 

 pennsylvanica, 209. 



pumila, 268, 283, 284, 286, 287. 288, 

 289, 295, 299, 307, 30S. 310, 318, 342, 

 343, 360. 

 serotina, 129, 132, 134. 136, 143. I57. 



209, 314, 341, 343, 360. 

 sp.. 143. 158. 



virginiana. 128, 129, 130, 132, 134, 138, 

 T4S. 157, 209, 343, 360. 

 Psedera quinquefolia, 108, 128, 134, 136, 



137. 1.38, 143, 161, 291. 362. 

 Ptelea trifoliata, 209, 278, 361. 



Pteridophyta, 353. 592. 

 Pteris, 130, 585. 



aquilina, 125, 126, 129, 130, 135, 146, 

 307. 314. 335. 339, 353- 

 Pterostichus, 18. 

 Puccoon, 295. 364, 369. 

 Pumpkinseed, 521, 523, 526, 538. 

 Purslane, Milk, 361. 



Water, 363. 

 Pycnanthemum flexuosum, 606. 



virginianum, 305. 311, 314. 318, 330. 

 333^ 335. 33(i. 337. 342, 365- 

 Pyrola elliptica, 130, 134, 163. 

 Pyrus, 205. 



americana, 41, 125, 127, 157. 



angustifolia, 208. 



coronaria, 208. 



ioensis, 143, 157, 209. 



malus, 157, 360. 



soulardi, 209. 



Quadrula asperrima, 531, 533. 



ebena, 530, 536. 



heros. 531, 533, 536. 



plicata, 528, 529, 530, 531, 532. 533, 536. 



pustulosa, 530, 531, 533. 



sp., 530- 



trigona. 533. 



undulata, 532, 533. 

 Quail, 375. 

 Quercus, 43. 



acuminata, 207. 



alba, 129, 132, 134, 153, 207, 313, 315, 

 344, 358, 577, 579. 



bicolor, 207, s'79, 5P0, 581. 591. 



coccinea. 207, 579. 



digitata, 208. 



ellipsoidalis, 208. 



falcata, 208. 



imbricaria, 208. 



leana, 208. 



lyrata, 207. 



macrocarpa, 129, 132. 134, 136, 153, 



207, 313. 315. 344. 350. 358, 577- 

 marilandica, 41, 121, 122, 126, 137, 153, 



208, 313. 

 michauxii. 207. 

 minor, 207 

 mublenbergii, 207. 

 nigra, 208. 

 obtusiloba, 207. 



pagod.-efolia. 208, 231, 232. 234. 

 palustris, 208, 232. 



pbellos, 208. 

 platanoides, 207. 



