460 



INDEX, 



Polypodium taxifolium, iii. 670. 



tetragonum, iii. 670. 



tetragonum, iii. 645. 



thyssanolepis, iii. 670 ; iv. 



116. 



trichomanoid.es, iii. 671 ; iv. 



116. 



trilobatum, iii. 655. 



trilobum, iii. 671. 



truncicola, iii. 671. 



undulatum, iii. 671. 



undulatum. var. parvulum, iii. 



671. 



vaccinifoKum, iii. 671. 



vanheurckii, iii. 671. 



virginianum, iii. 658. 



vulgare, iii. 672. 



wagneri, iii. 665. 



xiphopteroides, iii. 666. 



Polypogon, iii. 552. 



Polypogon, iii. 515. 



Polypogon brachyphyllus, iii. 552. 



ciliatus, iii. 539. 



elongatus, iii. 552. 



mexicanus, iii. 553. 



monspeliensis, iii. 552. 



tenellus, iii. 542. 



Polypremum:, ii. 340. 

 Polypremum linncei, ii. 340. 



procumbens, ii. 340. 



schlechtendalii, ii. 340. 



Polypteris, iv. 59. 



latifolia, iv. 59. 



Undent, iv. 59. 



texana, iv. 59. 



Polystachya, iii. 248. 

 Polystaehya cerea, iii. 248. 



cerea, iv. 303. 



clavata, iii. 248. 



lineata, iii. 248. 



luteola, iii. 248. 



luteola, iv. 269, 270. 



minuta, iii. 221. 



niasayensis, iii. 249. 



zeylanica, iii. 249. 



POLYSTEMMA, ii. 336. 



Polystemma, iv. 254. 

 Polystemma viridiflora, ii. 336. 

 Polystichum aculeatum, iii. 642. 



ampUficatum, iii. 642. 



confluens, iii. 642 



cystopteroides, iii. 649. 



distorts, iii. 642. 



drepanoides, iii. 642. 



grande, iii. 642. 



hartwegii, iii. 642. 



melanostictum, iii. 643. 



Polystichum melanostictum, iii. 643. 



moritzianum, iii. 642. 



mulleri, iii. 642. 



muricatum, iii. 642. 



ordinatum, iii. 642. 



pallidum, iii. 642. 



platyphyllum, iii. 642. 



rhachichlcena, iii. 642. 



seemanni, iii. 643. 



semicordaturn, iii. 643. 



vestitum, iii. 642. 



Polytcenium lanceolatum, iii. 680. 

 Polythysania parviflora, ii. 484. 

 Pomaria humilis, i. 326. 



melanosticta, i. 326. 



Pomatium, ii. 87. 

 POMEJE, i. 379. 

 Ponera, iii. 223. 

 Ponera albida, iii. 223. 



amethystina, iii. 223. 



behrii, iii. 219. 



bilineata, iii. 223. 



dubia, iii. 219. 



graminifolia, iii. 223. 



juncifolia, iii. 223. 



kienastii, iii. 219. 



macroglossa, iii. 223. 



mesocopis, iii. 220. 



striata, iii. 223. 



striata, iv. 301. 



striolata, iii. 223. 



Pongatium indicum, ii. 270. 

 Pontederia, iii. 383. 

 Pontederia azurea, iii. 384. 



cordata, iii. 383. 



cordifolia, iii. 384. 



lanceolata, iii. 383. 



limosa, iii. 385. 



rotundif olia, iii. 384. 



PONTEDERIACE^E, iii. 383. 

 Pontederiacece, iv. 197, 204, 217, 231. 

 Ponthieva, ii. 299. 

 Ponthieva ephippium, iii. 299. 



glandulosa, iii. 299. 



glandtdosa, iv. 269, 270. 



guatemalensis, iii. 299. 



oblongifolia, iii. 299. 



oblongifolia, iv. 301. 



Popultjs, iii. 180. 



Populus angustifolia, iii. 181. 



balsamifera, iii. 180. 



canadensis, iii. 181. 



fremontii, var. ? wislizenii, iv. 



88. 



mexicana, iii. 181. 



Porcelia, i. 14 ; iv. 96. 

 Porcelia hahniana, i. 15. 



Porliera angustifolia, iv. 140. 



POROPHYLLUM, ii. 216. 



Porophyllum, iv. 60, 252. 

 Porophyllum amplexicaule, ii. 216. 



coloratum, ii. 216. 



decumbens, ii. 216. 



eUipticum, iv. 60. 



ervendbergii, iv. 60. 



filifolium, iv. 60. 



gracile, iv. 60. 



greggii, ii. 216. 



jorullense, ii. 217. 



linaria, ii. 217 ; iv. 60. 



lindenii, ii. 217. 



linifolium, ii. 217. 



macrocephalum, ii. 217 ; iv. 60. 



nummularium, ii. 217. 



obtusifolium, ii. 217. 



scoparium, ii. 217 ; iv. 60. 



scoparium, iv. 141. 



seemannii, ii. 217. 



tagetoides, ii. 217. 



viridiflorum, ii. 217. 



Porphyrospatha, iii. 424. 

 Porphyrospatha, iv. 278. 

 Porphyrospatha hoffmannii, iii. 424. 



schottiana, iii. 424. 



Portesia ovata, i. 183. 



PORTLANDIA, ii. 14. 



Portlandia mexicana, ii. 14. 

 mexicana, ii. 13. 



PORTTJLACA, i. 78. 



Portulaca foliosa, i. 78. 



• oleracea, i. 78. 



pilosa, i. 78. 



PORTULACE^E, i. 77 ; iv. 12. 

 Portulaceee, iv. 174, 204, 211, 216, 



224, 229, 234. 

 Posoqueria, ii. 39. 

 Posoqueria coriacea, ii. 39. 



latifolia, ii. 39. 



macrophylla, ii. 39. 



panamensis, ii. 39. 



POTAMOBRYON, iii. 40. 



Potamobryon concinnum, iii. 40. 



laxum, iii. 40. 



patulum, iii. 40. 



POTAMOGETON, iii. 441. 



Potamogeton angustifolium, iii. 441. 



angustissimum, iii. 441. 



hybridus, iii. 441. 



liebmanni, iii. 441. 



lonchitis, iii. 441. 



lucens, iii. 441. 



natans, iii. 441. 



pauciflorus, iii. 441. 



pectinatus, iii. 442. 



