JANUARY 1 TO DECEMBER 31, 1960 
Pinus ayacahuite—Continued 
strobus, 265204, 265277. 
sylvestris, 262701, 262715. 
thunbergui, 266179, 270355. 
-yunnanensis, 266468. 
Piper crocatum, 265937. 
nigrum, 269304. 
 ornatum, 263984, 265938. 
Pistacia sp., 269541, 269542. 
Pisum elatius, 268479, 268480, 269760, 
269761. 
jomardi, 269762, 269763. 
sativum, 263008—-263014, 263026- 
263033, 263144, 2638871, 266069, 
266070, 267860, 267861, 269543, 
269544, 269764—269826. 
Pittosporum crassifolium, 267819. 
tenuifolium, 267820. 
Plagianthus betulinus, 264588. 
divaricatus, 264589. 
Platanus X acerifolia, 265626, 265627. 
orientalis, 265628. 
Platycerium angolense, 265939. 
Plectranthus ciliatus, 267298. 
Plum. See Prunus domestica. 
Poa angustifolia, 268416, 269963. 
australis, 263868. 
bulbosa, 2638193, 268415. 
lanuginosa, 264406, 269649. 
ligularis, 264407, 269650. 
nemoralis, 267064. 
pratensis, 264768, 266209, 267065, 
267066, 269392. 
sterilis, 269962. 
Podecarpus (hybrid), 269624. 
henckelai, 266981. 
nivalis, 266438. 
Pogonatherum sp., 269398. 
Poinciana, royal. See Delonix regia. 
Poinsettia. See Huphorbia pulcher- 
rima. 
Polypodium nigrescens, 263986. 
Pomegranate. See Punica granatum. 
Populus xX canadensis, 265629, 
265632, 266439-2664438. 
lasiocarpa, 266444. 
tremula, 265630, 266678. 
tremuloides, 265631. 
wilsonti, 266445. 
Portiatree. See Thespesia populnea. 
Potato. See Solanum tuberosum. 
Potentilla fruticosa, 265039, 265633- 
265635, 266482, 266619-266623, 
266625. 
fruticosa var. parvifolia, 265636. 
fruticosa var. pyrenaica, 266446, 
266624. 
fruticosa var. rigida, 266618. 
fruticosa var. vilmoriniana, 
266626. 
Premna integrifolia, 267708. 
Pringlea antiscorbutica, 2658382. 
Privet. See Ligustrum spp.* 
Japanese. See L. japonicum. 
307 
Japanese. See L. japonicum. 
Proso. See Panicum miliaceum. 
Protea neriifolia, 270304. 
Prunus (hybrid), 267711. 
amygdalus, 269545—-269557. 
apetala, 269259. 
apetala var. pilosa, 269266. 
armentaca, 263855, 267188-267190, 
268268, 268418-268420, 269394, 
269558—-269572, 270386. 
avium, 263856, 263857. 
brigantina, 268269. 
cerasijera, 265637. 
cerasus, 2693895. 
domestica, 265833. 
haussknechtui, 268270. 
incisa var. ontakensis, 269261. 
incisa var. tomentosa, 269262. 
incisa var. yamadei, 269263, 
269264. 
jacquemontu, 269347. 
laurocerasus, 266551—-266553. 
maacku, 262702, 262716. 
maximowierti, 269265. 
nipponica, 269266, 269267. 
persica, 264377—264882, 269573-— 
269580, 270337. 
sargentri, 269268. 
sargentu, f. compta, 269269. 
serotina, 264248. 
serrulata var. spontanea, 266907. 
sieboldu, 263692. 
spartioides, 268271. 
subhirtella, 266908, 
269271. 
syodoi, 269272—-269274. 
tschonosku, 269275. 
verecunda, 269276. 
sp., 262978, 263565, 267700, 
268019-268058, 268272—-268277, 
268421—2684238, 269581—269586. 
Pseudotsuga menziesu, var. glauca, 
265278, 265279, 266754. 
Ptelea trifoliata, 265638. 
Pterocarya fraxinifolia, 265639. 
rhoifoetia, 265640. 
Pterostyrax hispida, 266355, 266356. 
Pumpkin. See Cucurbita pepo. 
Punica granatum, 269587, 269588. 
Pyracantha (hybrids), 263095, 266585, 
269950, 269951. 
angustifolia, 2638658, 
2645538, 270356. 
coccinea, 262979, 262980, 263848, 
266581, 266768—266770. 
coccinea X crenulata var. roger- 
siana, 266794. 
coccinea var. lalandei, 266582. 
crenato-serrata, 266584. 
crenulata, 265908, 266583. 
fortueana, 263091—263094, 264683, 
266771. 
sp., 264590, 269357. 
269270, 
263847, 
