JANUARY 1 TO DECEMBER 31, 19 57 



407 



Pinus cembra, 237327. 



cembroides, 237248. 



densi flora, 237249. 



heldreichii var. leucodermis, 237250. 



koraiensis, 238980, 238981. 



lambertiana, 239551, 239552. 



mugo, 237251, 238590. 



nigra, 238201, 238642, 241974. 



patula, 239553. 



pentaphylla, 238597. 



pinaster, 238711. 



ponderosa, 244394. 



pumila, 237247, 237328, 244382. 



X schwerinii, 237252. 



sylvestris, 237253, 237254, 237329- 

 " 237331, 238032. 

 Piper celtidifolium, 240043. 



kadzura, 241158. 



magnificum, 240498. 



methysticum, 237834, 239688, 

 240494. 



nigrum, 240828. 



ornatum, 241607. 



sp., 239523. 

 Piptanthus forrestii, 242297. 



laburnifolius, 242408. 



sp., 237474. 

 Pisum jomardii, 242027. 



sativum, 236489-236494, 240513- 

 240519, 241593, 242028, 244054, 

 244055, 244088-244272. 

 Pithecellobium dulce, 240719. 

 Pittosporum, cape. See Pittosporum 



viridiflorum. 

 Pittosporum confertiflorum, 236376. 



Coriaceum, 241358. 



heterophyllum, 243276. 



huttonianum, 241922. 



virodiflorum, 237615, 240044. 

 Plagiosetum rejr actum, 238349. 

 Plantago albicans, 240287. 



lanceolata, 242649. 



major, 242648. 



maritima, 242650. 

 Plantain. See Plantago spp.* 

 Platycarya strobilacea, 238033, 238045. 

 Platyclinis sp., 242769. 

 Plectrachne rigidissima, 238350. 

 Plectranthus ciliatus, 239685. 

 Pleiostachya sp. 242409. 

 Plum, Alpine. See Prunus brigantina. 



common. See P. domestica. 



Myrobalan. See P. cerasifera. 

 Plumbago scandens, 241803. 

 Poa acicularifolia, 237162. 



alpina, 236892-236897. 



ampla, 236898, 236899. 



annua, 236900. 



arctica, 236901, 236902. 



bulbosa, 237673. 



caespitosa, 240478-240485. 



canbyi, 236903-236905, 241066, 

 241067. 



compressa, 236906, 236907, 243216. 



flabellata, 237641. 



glauca, 236908. 



Poa — Continued 



interior, 236909-236911. 



lindsayi, 237163. 



maniototo, 237164. 



palustris, 236912-236914. 



pratensis, 236603, 236915, 236916, 

 236918-236921, 236924, 236925, 

 237192, 237282, 237709, 237807- 

 237811, 241068. 



sienantha, 236922. 



trivialis, 238987. 



sp., 236917, 236923, 237165. 

 Podalyria canescens, 242365. 

 Podocarpus gracilior, 241377. 



mannii, 238956, 241869. 



neriifolius, 241923. 

 Podranea brycei, 241028, 241385. 



ricasoliana, 241335. 

 Pogonatherum crinitum, 241544, 241545. 



paniceum, 239524-239526, 241546. 

 Poinsettia. See Euphorbia pulcherrima. 

 Pokeberry. See Phytolacca acinosa. 

 Poly gala microphylla, 238712, 243878. 



myrtifolia, 241581. 



nicaeensis, 239370, 241336. 

 Polygonatum falcatum, 239599. 

 Polygonum ephedrioides, 239546. 



paleaceum, 237475. 



sachalinense, 244383, 244384. 



sp., 237476. 

 Polystachya cultriformis, 242758, 242759. 

 Polytoca macrophylla, 239195, 239196, 

 239527-239529, 239659, 241547- 

 241553. 

 Poncirus trifoliata, 240121. 

 pandorea, Ricasol. See Podranea 



ricasoliana. 

 Poplar. See Populus spp.* 

 Populus X canadensis, 238170. 



X robusta, 238555-238559. 



tremula, 238034, 238171, 238172. 

 Porana sp., 237477. 

 Porphyrostachis pilifera, 239144. 

 Potato. See Solanum tuberosum. 

 Potentilla fruticosa, 242207-242214, 

 242217, 242218, 242242-242245, 

 242298, 242893, 244654. 



fruticosa var. farreri, 242215, 

 242216. 



fruticosa var. grandiflora, 242219. 



fruticosa var. mandshurica, 242220. 



fruticosa var. rigida, 242221, 242222. 



fruticosa var. veitchii, 242246. 



fruticosa var. vilmoriniana, 242223. 



sp., 237478. 

 Pothos scandens, 242366. 

 Prestonia venosa, 242332. 

 Primrose. See Primula mollis. 



Himalayan. See P. denticulata. 

 Primula denticulata, 237479. 



mollis, 237481. 



sp., 237480. 

 Pr ionium palmita, 240315. 

 Privet. See Ligustrum spp.* 



