RHEUM— RHODODENDRON 



395 



Hort. var. of Rheum: 



Tangutian Rhubarb {li. palma- 

 tum tanguticum\ Cy) 

 Rhex Cherry (Prunus cerasus rhexi\ 



Cy) 

 RHEXIA .... Meadowbeauty 

 mariana .... Maryland M. 

 virginica Common M. 



RHIPSALIS 



cassutha {R. cassijtha Cy) 



Mistletoe Cactus 



paradoxa Chain C. 



salicornioides 



Hatiora salicornioides 



RHODANTHE . . HELIPTERUM 

 Rhode Island Bent 



Agrostis capillaris 

 Rhodes Grass . . Chloris gayana 



RHODOCHITON 



volubile . . . Purple Bellvine 

 RHODODENDRON Rhododendron 



See also Azalea. "Ar" in the following 

 list refers to the Arnold Arboretum 

 "Monograph of Azaleas," April 15, 1921. 



albiflonim Rocky 



Mountain Rhododendron 

 arborescens Cy-Ar 



Azalea arborescens 

 arboreum . Tree Rhododendron 

 arbutifolium. 



See common-name list, page 396. 



brachycarpum . . . Fujiyama R. 

 calendulaceum Cy-Ar 



Azalea calendulacea 

 calif ornicum {wasldngtonianum ; 

 macroyhylluni) 



Coast Rhododendron 



calophytum Bigleaf R. 



campylocarpum Hone^tjell R. 

 canadense Cy-Ar 



Rhodora canadensis 

 canescens Cy-Ar . Azalea canescens 

 carolinianum 



Carolina Rhododendron 

 — album {carolinicmum margarettae) 



White Carolina R. 

 catawbiense .... Catawba R. 

 caucasicum . . . Caucasian R. 

 ciliatum Fringed R. 



RHODODENDRON, continvud 



concinnum 



The name R. concinnum is often mis- 

 applied to R. yanthinum. 



coreannm . . Azalea poukhanenis 

 dahuricum (R. duuricum Ag-.\r) 



Dahikia.v Rhododendron 

 davidsonianum . . Davidson R. 

 decorum 



faberi Faber R. 



ferrugineum Rock R. 



fioribundum 



g(ind(iveii.^c Ar Azalea gandavensis 

 hirsutum CIarland Rhododendkox 

 indiciuti Cy-Ar . . . Azalea indica 

 intricatum . Bluet Rhododkndhon 

 jayonicmn Cy-Ar . Azalea japonica 

 'kaempferi Cy ... A. kaempferi 

 kamtschaticum 



Kamchatka Rhododendron 

 laetevirens Wilson R. 



See common-name list, page 399. 



lapponicum Lapland R . 



ledifoliiwi Cy . . Azalea ledifolia 



longistylum 



lutescens 



luteum Cy-Ar .... A. pontica 



macrophylluvi 



Rhododendron calif ornicum 

 maximum {maximum album) 



Rosebay Rhododendron 

 — roseum . . . Pink Rosebay R. 

 metternichi . . Leatherleaf R. 

 micranthum . . Manchurian R. 

 minus (punciatum) . Piedmont R. 



See note under R. punctatum. 



molle Ar Azalea mollis 



morleri Cy . . . .A. gandavensis 

 mortieri Ar ... A. gandavensis 

 mucrottaium Ar ... A. ledifolia 

 mucronulatum {R. dauricuut mn- 

 cronulaium Ar) 



Korean Rhododendron 

 nudiflorum Cy-Ar Azalea nudifiora 

 obtusum amoenum Cy-.\r A. amoena 

 — kaempferi Ar . . A. kaempferi 

 occidentale Cy-Ar . A. occidentalis 

 parvifolium 



ponticum . Pontic Rhododenordn 

 poukhancnse Cy 



Azalea poukhanensis 



Small CAPiTAL8=approved common names. Abbreviations: (.\g) (Ar) (Cy) (t) see page 1, 



