526 



LOTAXICAL INDEX 



Pogonia ophioglossoides, 291. 420. 



vertieellata, 222, 238, -17, 2S3, .(20. 

 Poison Ivy, 452. 

 Poison Sumac, 452. 

 Poke, 430. 



Polanisia graveolens. 143, }•». 

 Polemoniaceae, {72. 

 Polemoiiinin reptans, 281, 290, {73. 



van bruntiae, ',73. 

 Polygala amibigua, {50. 



cruciata, 120, 1,50. 



inearnata, 115. 450. 



lutea, 71, 78, 87, 117. 450. 



mariana, 115, 121, 137. 206, 451. 



nuttallii. lie, 217, 451. 



paucifolia, 451. 



senega, 451. 



verticillata, 121, 214, 227, 266, 286, 

 450. 



viridescens, 225, 287; iSO. 

 Polygalaceae, {50. 

 Polygonaceae, 429. 



Polygonatum biflorum, 121, 123, 223. 

 237, 418. 



commutatum, 417. 

 Polygonum acre, 139, 140, j29. 



ampbibium, 124. 141, 429. 



arifolium, 134, 164, 173, {29. 



avicularc, 190, 191, I-':'. 



convolvulus, {29. 



erectum. 429. 



hydropiper, 113, 12S, 139, 1S3, 429. 



hydropiperoides, 134, {29. 



mai'itinmm, 84, 142. 187, {29. 



pennsylvanicum, {29. 



persicaria, 191, 430. 



punctatum, {29. 



sagittatum, 134, 172, 173. 179, 224, 

 429. 



scandens, {29. 



tenue, {29. 



virginianuni, 165, {29. 

 rolymnia canadensis, 75, 241. {9{. 



uvedalia, {9{. 

 Polypodiaceae, 3S6. 

 Polypodium polypodioides, 3S9. 



vulgare, li"2, 209, 223, 233. 242, 

 244, 263, 266, 284, 3S9. 

 Polypody, 389. 

 Polypody. Gray, 389. 

 Polypogon monspeliensis, {00. 

 Polypremum procumbens, 72, 79, 116, 



{69. 

 Pomaceae, {{{. 

 Tond Lily, Yellow, 433. 

 Tondweed, 394. 



1'ontederia cordata. 125, 128, 132, 133, 

 139, 141, 144, 172, 1S3, 41',. 



Pontederiaceae, 414. 

 Poplar, American, 423. 



Large-toothed, 264, 423. 



I.ombardy, 423. 



Silver, 422. 



Swamp. 124, 125, 422. 

 Poppy, Garden, 437. 



Long Smooth-fruited, 437. 



Mexican. 437. 



Opium, 437. 



Prickly, 457. 



Sea, 457. 

 Populus alba, {22. 



dilatata, 423. 



grandidentala, 233, {2S. 



beterophylla, {22. 



I nmuloides, 423. 

 Porterantbus trifoliatus. 74, 206, 209, 



223, 25.".. 235, 24S, 2S3, {{2. 

 Portulaca oleracea, 192, 431. 

 Portulacaceae, 431. 

 Potamogeton crispus, 82. S3, 140, 395. 



diversifolius, 141, 395. 



lonchites, 141, S9{. 



mysticus, 395. 



natans, 141, 171, 394. 



nuttallii, 141. 224, 39',. 



pectinatus, S3, 141, 395. 



perfoliatus, 39.',. 



pulcher, 341, 394. 



pusillus, S95. 



zosteraefolius, 395. 

 Potentilla canadensis, 120. 153, 191, 205, 

 200. 209, 214, 2G3, 2S2, 285, 44S. 



monspeliensis, 234, 443. 

 Poverty Grass. 399. 

 Prickly Pear, 459. 

 Primrose-willow, Upright, 460. 

 Primulaceae, {6S. 

 Proserpinaea palustris, 71, 115, 124, 126, 



129. 134, 135, 431. 

 Prunella vulgaris, 191, 227, {76. 

 Primus pennsylvanica, {{{. 



serotina, 230, {{{. 

 Ptelea trifoliata, 74, 450. 

 Pteridophyta, 386. 

 Pteris aquilina. 115, 15S, 190, 193, 222, 



226, 234, 283, 286, 3S9. 

 Ptilimnium capillaceum, 83, 85, 134, 136, 



179, 183, {6{. 

 Puccoon, Hoary, 474. 

 Punica granatum, 81. 

 Purslane, 431. 

 Purslane, Marsh, 460. 

 1'yrola elliptica, 285, {fi5. 



chlorantha. {65. 



rotundifolia, 120, 207, {65. 



secimda, 465. 

 Tyrolaceae, {65. 



