54 MASS. EXPERIMENT STATION BULLETIN 382 



Page 



Primus japonica Thunb 31 



Prunus Laurocerasus L., cherry laurel 31 



Prunus maritima Marsh., beach plum 31 



Prunus Padus L., European bird cherry 31 



Prunus pseudoccrasus Lindl 31 



Prunus subhirtclla Miq., Higan cherry 31 



Pntnus tomentosa Thunb 31 



Prunus triloba Lindl., flowering almond 31 



Pscudotsuga taxifolia (Poir.) Brit., Douglas-fir 31 



Pterocarya stenoptera DC 31 



Pueraria Thunbergiana (Sieb. & Zucc.) Benth., Kudzu-vine 31 



Pyracantha atlantioidcs ( Hance) Stapf 32 



Pyracantha coccinca Roem 4, 5, 32 



Pyracantha crcnulata (Roxb.) Roem 32 



Pyrus communis L., common pear 32 



Pyrus pyrifoiia (Burm. ) Nakai, sand pear 32 



Quercus borealis, Michx. f ., red oak 32 



Qucrcus robur L., English oak 32 



Quince, Cydonia oblonga 19 



Quince, Japan ; Chacnoniclcs lagenaria 2, 10, 16 



Raspberry, Rubus 8, 36 



Redbud, Ccrcis 16 



RJianinus, buckthorn 3, 4 



RJwdodoidron arbor cscens (Pursh) Tort 2>2i 



Rhododcndroji calc7idii!aceum (Michx.) Torr 33, 34 



RJiododcndroii canadcnse (L.j Torr., rhodora 33, 34 



Rhododendron cancsccns (Michx.) Sweet 33 



Rhododendron Collctiianuni Aitch 33 



Rhododendron dauricuni L 33 



Rliododendron gandavcnse (K. Koch) Rehd., Ghent azalea 33 



Rlwdodendron hirsutum L 33 



RJiododendron indicmn (L.) Sweet 32 



Rhododendron japonicuin (Gray) Suringar 32 



Rhododendron laetevirens Rehd 32 



Rhododendron lapponicum Wahlenb 32 



Rliododendro)! maximum L 32 



Rhododendron micranthum Turcz 33 



Rhododendron minus Michx 3"? 



Rhododendron mixtum Wils 33 



Rhododendron molle ( Bl.) G. Don 33 



Rhododendron mucronatum G. Don 33, 34 



Rhododendron mucronulatuin Turcz 33, 34 



Rhododendron nudMorum (L.) Torr., pinxter flower 33 



Rlwdodendron obtusum (Lindl.) Planch 33. 34 



Rhododendron obtusum (Lindl.) Planch, var. japonicum (Maxim.) Wils. 33 



(includes Kurume azaleas) 



Rhododendron obtusum (Lindl.) Planch, var. Kaempferi (Planch.) Wils. 33 



Rhododendron ponticum L 33 



Rhododendron pulchrum Sweet 33, 34 



Rlwdodendron raeemosuin Franch 32 



Rhododendron reficulatuni D. Don 33 



Rhododendron roseum (Loisel.) Rehd 33 



Rhododendron Schlippenbachii Maxim 33 



Rhododendron Vascyi Gray 33 



Rhododendron viseosepalum Rehd 33, 34 



Rhododendron fuiscoswn (L.) Torr., clammy azalea 33 



Rhododendron yedoense Maxim, var. poukhanensc (Levi.) Nakai .... 33, 34 



Rhododendron yunnanense Franch 32 



Rhodora, Rhododendron canadensc 33, 34 



Rhodotypos scandcns ( Thunb.) Mak 34 



Rhus aromalica Ait., fragrant sumac 34 



Rhus typhina L., staghorn sumac 34 



Ribes spp., currant 3 



Ribcs alpinum L., alpine currant 34, 35 



Ribes Grossularia L 35 



Ribcs nigrum L., European black currant 34 



Ribes rnhrum L., northern red currant 34 



