INDEX. 



457 



Pluchea, ii. 133. 

 Pluchea auriculata, ii. 133. 



borealis, iv. 141. 



camphorata, iv. 53. 



cortesii, ii. 133. 



floribunda, ii. 130. 



odorata, ii. 133 ; iv. 54, 112. 



purpurascens, ii. 133 ; iv. 103. 



subdecurrens, ii. 133. 



, var. canescens, iv. 54. 



Plttkenetia, iii. 131. 

 Plukenetia penninervia, iii. 131. 

 PLUMBAGINE^E, ii. 286; iv. 67. 

 Plumbaginece, iv. 185, 205. 

 Plumbago, ii. 287. 

 Plumbago mexicana, ii. 287. 



pulchella, ii. 287; iv. 67. 



rhomboidea, ii. 287. 



scandens, ii. 287. 



scandens, iv. 67. 



Pltjmebia, ii. 308. 

 Plumeria acuminata, ii. 308. 



acutifolia, ii. 308. 



gouani, ii. 308. 



lambertiana, ii. 308. 



megaphylla, ii. 309. 



mexicana, ii. 308. 



mollis, ii. 309. 



rubra, ii. 309. 



xanthostoma, ii. 309. 



Pneumonanthe bicuspidata, ii. 349. 



Poa, iii. 579. 



Poa, iii. 567; iv. 149. 



Poa acutiflora, iii. 572. 



annua, iii. 579. 



annua, iii. 580 ; iv. 150. 



bourgaei, iii. 580. 



capillaris, iii. 573. 



ciliaris, iii. 573. 



condensata, iii. 578. 



conglomerata, iii. 580. 



conglomerata, iv. 297, 305. 



depauperata, iii. 580. 



eragrostis, iii. 575. 



heenkei, iii. 572. 



hirsuta, iii. 574. 



hypnoides, iii. 576. 



infirma, iii. 580. 



infirma, iv. 297. 



interrupta, iii. 574. 



maypurensis, iii. 574. 



megastachya, iii. 575. 



mexicana, iii. 574. 



montufari, iii. 574. 



oxylepis, iii. 674. 



panicoides, iii. 574. 



Poa patula, iii. 574. 



pauciflora, iii. 580. 



pectinacea, iii. 575. 



polymorpha, iii. 574. 



preslei, iii. 579. 



prostrata, iii. 578. 



rariflora, iii. 576. 



reptans, iii. 576. 



ruprechtii, iii. 580. 



subumbellata, iii. 576. 



subuniflora, iii. 580. 



ihalassica, iii. 579. 



POACE^E, iii. 531. 

 Poacece, iv. 199. 

 PoDACiLsiNitnvr, ii. 192. 

 Podaehsenium paniculatum, ii. 192. 

 Podocarpece, iii. 185. 

 Podocarpus, iii. 185; iv. 156, 265, 



314. 

 Podoptebus, iii. 37. 

 Podopterus, iv. 259. 

 Podopterus mexicanus, iii. 38. 

 Podoseemum brachyphyllum, iii. 



552. 



ciliatum, iii. 539. 



debile, iii. 540. 



distichophyllum, iii. 540. 



glabratum, iii. 541. 



glaucum, iii. 539, 551. 



gracile, iii. 541. 



implicatum, iii. 541. 



mexicanum, iii. 551. 



mticronatum, iii. 541. 



quadridentatum, iii. 541. 



rigidum, iii. 542. 



setosum, iii. 540. 



stipoides, iii. 535, 542. 



striatum, iii. 542. 



tenellum, iii. 542. 



tenuifolium, iii. 343. 



tenuissimum, iii. 543. 



viresoens, iii. 543. 



virginicum, iii. 548. 



PODOSTEMACE^E, iii. 38. 

 Podostemacece, iv. 191, 204, 217, 



231. 

 P<eppigia, i. 323. 

 Pceppigia procera, i. 323. 

 Pogonatherum crinitum, iv. 94. 

 Pogonia, iii. 304. 

 Pogonia rosea, iii. 304. 

 Pogonopsis scabra, iii. 588. 



tenera, iii. 588. 



tenera, iii. 560 ; iv. 94. 



Pogonoptts, ii. 15. 

 Pogonopus exsertus, ii. 15. 



Pogonorhynchus amplexans, i. 429. 

 Pogospermum, iii. 324. 

 Pogostoma saxifrageefolia, ii. 455. 

 Pohlia minor, iv. 150. 

 Poinciana coriaria, i. 324. 



pulcherrima, i. 325. 



Poinsettia cyathophora, iii. 95. 



dentata, iii. 93. 



edwardsii, iii. 95. 



exclusa, iv. 85. 



franguleefolia, iii. 94. 



geniculata, iii. 94. 



heterophylla, iii. 95. 



lancifolia, iii. 96. 



cerstediana, iii. 98. 



peduncidata, iii. 101. 



prunifolia, iii. 94. 



puleherrimum, iii. 99 ; iv. 



144. 



radians, iii. 99. 



ruiziana, iii. 94. 



schiedeana, iii. 93. 



xalapensis, iii. 102. 



Poiketia, i. 269. 

 Poiretia multiflora, i. 269. 



-scandens, i. 269. 



Poivrea alternifolia, i. 403. 

 Polanisia, i. 42. 

 Polanisia graveolens, i. 42. 



trachysperma, i. 42 ; iv. 7. 



uniglandulosa, i. 42. 



POLEMONIAOE^E, ii. 353; iv. 



71. 

 Polemoniacece, iv. 187, 203, 215, 



217, 225, 229, 255. 

 Polemonium, ii. 355. 

 Polemonium, iv. 150, 255. 

 Polemonium grandiflorum, ii. 355. 



grandiflorum, iv. 291. 



mexicanum, ii. 356. 



Polianthes, iii. 337. 

 Polianthes gracilis, iii. 337. 



maculata, iii. 337. 



mexicana, iii. 337. 



tuberosa, iii. 337. 



Poliomintha, ii. 549. 

 Poliomintha glabrescens, ii. 549. 



incana, ii. 549. 



longiflora, ii. 550. 



marifolia, ii. 550. 



mollis, ii. 550. 



Polyactidium delphinifolium, ii. 



124. 



seemannii, ii. 120. 



PolyaHhia, i. 15. 

 Polyanthus, iii. 337. 



