394 



STANDARDIZED PLANT NAMES 



Remont Spruce {Picea excelsa re- 

 monti^ Cy) 



RENANTHERA 



See ORCHID GENERA. 



Requien Mint 

 Rescue Grass 



Mentha requieni 

 Bromus unioloides 



RESEDA Mignonette 



odorata Common M. 



Resurrection Fern 



Polypodium polypodioides 

 Resurrectionplant 



Selaginella lepidophylla 

 Retinospora 



There is no such genus as Retinospora, 

 or Retinispora as it was originally 

 spelled. The plants referred to it are all 

 juvenile states of the genera Chamaecy- 

 paris and Thuja. The American Joint 

 Committee recognizes the trade con- 

 venience of the name Retinospora and is 

 therefore using it as a common name. 

 The following varieties of Retinospora 

 are in the American trade with the pos- 

 sible exception of Heath. 



Andely {Chamaecyparis thyoides an- 

 delyensis] Cy; Retinospora lep- 

 toclada) 



Cedar (C. thyoides ericoidesf Cy) 



Clubmoss (Chamaecyparis obtusa 

 lycopodioides] Cy) 



Fernspray (C. o.jilicoides\ Cy) 



Golden Sawara (Chariiaecyparis 

 pisifera aurea] Cy) 



Goldenplume (C. p. plumosa aurea 

 Cy; Retinospora plumosa aurea) 



Heath {Thuja occidentalis eri- 

 coides'\ Cy; Retinospora ericoides 

 Hort.; R. duhia) 



Moss (Chamaecyparis pisifera squar- 

 rosa\ Cy; Retinospora veitchi) 



Plume (C. p. plumosa^ Cy; Retinos- 

 pora plumosa) 



Sander (Chamaecyparis obtusa eri- 

 coides] Cy; Retinospora sanderi; 

 Juniper us sanderi) 



Sawara . Chamaecyparis pisifera 



SiLVERTip (C. pisifera plumosa ar- 

 gentea Cy) 



Thread (C. p. filifera] Cy; C. 

 obtusa filifera; Retinospora jilif- 

 era) 



RETINOSPORA 



Several varieties of Chamaecyparis and 

 Thuja that have been called Retinospora 

 by gardeners do not have the type of 

 foliage that entitles them to the common 

 name Retinospora. These are referred 

 below to their accepted common names 

 as horticultural varieties of Hinoki 

 Cypress (Chamaecyparis obtusa) and 

 American Arborvitae (Thuja occiden- 

 talis). 



ellwangeriana 



Tom Thumb Arborvitae 



obtusa . . Chamaecyparis obtusa 



— albospicata 



SiLVERTip Hinoki Cypress 



— aurea . . . Golden Hinoki C. 



— compacta .... Football C. 



— gracilis . . Slender Hinoki C. 



— gracilis aurea 



Yellowtip Hinoki C. 



— nana .... Dwarf Hinoki C. 



— pygmaea . . Pygmy Hinoki C. 

 Reuter Willow (S. reuteri] Ar) 

 Rex Begonia .... Begonia rex 

 RHAMNUS Buckthorn 



alatemus Italian B. 



alnifolia Alder B. 



alpina Alpine B. 



The name R. alpina is often misapplied 

 in the trade to R. fallax. 



califomica California Buckthorn 

 — tomentella . . Whiteleaf B. 

 caroliniana (Carolina) Carolina B. 



cathartica Common B. 



crenata Japanese B. 



The name R. crenata is often misapplied 

 to R. dahurica. 



dahurica (R. davurica Ag) 



Dahurian Buckthorn 



fallax Veiny B. 



frangula Glossy B. 



imeretina .... Caucasian B, 



purshiana Cascara B. 



RH APID OPH YLLUM 



hystrix Needle Palm 



RHAPIS Rhapis 



flabelliformis Fern R. 



humilis Reed R. 



RHEUM Rhubarb 



coUinianum Collin R. 



palmatum Sorrel R. 



rhaponticum .... Common R. 



BOLD-face=approved scientific names. /TAZic=synonyms or unapproved names. 



