JANUARY 1 TO DECEMBER 31, 1952 



213 



Polypogon australis, 202459-202461. 



elongatus, 202052, 202709, 203887, 



204266. 

 interrupt us, 202204, 202400, 204267. 

 monspeliense, 202514, 204268. 

 Poplar. See Populus spp. 

 black. See P. nigra. 

 Loinbardy. See P. nigra var. ital- 

 ica. 

 Populus, 199723, 199724, 200007-200009. 

 berolinensis, 199710. 

 canadensis f. erecta, 199713. 

 var. marilandica, 199717. 

 regenerata, 199719. 

 serotina, 199720. 

 deltoides var. missouriensis, 199711. 

 eugenei, 199714. 

 gelrica, 199716. 

 nigra, 199725. 

 nigra var. italica, 199726. 

 robust a, 199712, 199715, 199721. 

 vernirubens, 199722. 

 sp., 199718. 

 Portugal-laurel. See Prunus lusitan- 



ica. 

 Portulacaria afra, 204310. 

 Potato. See Solarium tuberosum. 

 Pouter ia ucuqui, 199785. 

 Pratia sp., 202205. 

 Proso. See Panicum miliaceum. 

 Prosopis chilensis, 200844. 

 denudans, 202206. 

 strombulifera, 202401. 

 sp., 202402. 

 Prunus, 199006, 199026-199028, 200010. 

 armeniaca, 199395, 199396, 199402- 



199411, 199651, 202612, 202613. 

 armeniaca var. ansu, 200011. 

 aviu m, 198981-198983, 199266, 

 199422 - 199429, 199431 - 199453, 

 199455-199502, 199505, 199652, 

 199663 - 199665, 199673 - 199676, 

 200066, 202053, 202119, 202120, 

 202614-202619. 

 campanulata, 200012, 200013. 

 canescens, 200014. 

 cerasoides, 200015. 

 cerasus, 199653, 199654. 

 cerasus var. semper florcns, 203823, 



203833. 

 conradinae, 203824. 

 cornuta, 200016. 

 cyclamina, 200017. 

 dasycarpa, 200018. 

 davidiana, 200019, 200020. 

 daivyckensis, 200021. 

 dielsiana var. laxa, 200022. 

 domestica, 199413, 199414, 199655, 

 199656, 200067-200070, 202054, 

 202055, 202207, 202620-202626. 

 e-ffusa, 199430, 199454. 

 fenzliana, 200023. 

 frutieosa, 200024. 

 incisa, 200026. 



incisa X campanulata, 200027. 

 incisa X sargentii, 200025. 

 415896 — 57 15 



Prunus — Continued 



jacquemontii, 203825. 



juddii, 200028. 



kansuensis, 200029. 



latidentata, 203826. 



la urocerasus, 200031-200035. 



litigiosa, 203829. 



lusitanica, 200036-200038, 203827. 



mandshnrica, 200040. 



maximowiczii, 203828. 



mume, 200041, 200042. 



nipponica var. kurilensis, 200030. 



persica, 198974-198976, 199387- 

 199394, 199397-199401, 199522- 

 199524, 202604-202611. 



persica var. nectarina, 201934. 



pilosiuscula var. media, 203830. 



pleiocerasus, 203831. 



prostrata, 200043. 



pseudocerasus, 203832. 



rufa, 200044. 



sargentii. 200045. 



scoparia. 200046. 



scopulorurn, 200047. 



serrula. 200048. 



serrulata, 200049. 



setnlosa, 200050. 



spinosa, 203182. 



tangutica, 200051. 



ussuriensis, 200555. 



virginiana var. demissa, 203180, 

 203181. 



spp., 200039, 202573, 203945. 

 Pseudopogonatherum irritans, 199867. 

 Pseudotsuga japonica, 200064. 

 Psilanthopsis kopakata, 203140. 

 Pso pilocarpus tetragonolobus, 200845. 

 Psoralea bituminosa, 200365. 



sp., 201826. 

 Pteronia glaucescens, 203376. 

 Puccinellia distans, 203469. 



qlaucescens, 202208. 



parviflora. 202056, 202403. 



spp., 202209, 202210, 202462. 

 Pucraria lobata. 203248. 

 Pumpkin. See Cucurbita pepo. 

 Pyracantha cocci nea, 203240. 

 Pyrus communis, 199412, 199657-199660, 

 199762, 199789, 200280, 200281, 

 200378, 202057. 

 sp., 200846. 



Quercits acutissima, 203564. 

 aegilops, 203576. 

 brutia, 198952, 203536. 

 castaneaefolia, 198944, 204318. 

 cerris, 198954, 203284, 203537. 

 coccifera, 203285, 203577, 203578. 

 gilva, 198949. 



glandulifera, 203251, 203566. 

 liaas, 203286. 

 ilex, 198946. 198956, 199238, 203287. 



203538, 203579, 204319. 

 ilicifolia. 203332. 

 longinuw, 198950, 198951. 

 lusitanica, 203252. 



