26 



STANDARDIZED FLANT NAMES 



AZALEA, eontmued 



cultural variety belonging to the Kur- 

 ume group of cultivated Azaleas. See 

 note under A. obtusa kiusiana. 



arborescens {R. arborescens Cy-Ar) 

 Sweet Azalea 

 atlantica (R. atlanticimi Ar)CoA&T A. 

 hahaminaeflora A. indica rosaeflora 

 calendulacea (^1. lutea Ag; R. 

 calendidaceum Cy-Ar) 



Flame Azalea 

 canadensis . . Rhodora canadensis 

 canescens {R. canescens Ar; R. 

 canescens Cy, in part) 



Piedmont Azalea 



The northern plant heretofore included 

 under A. canescens of the South proves 

 to be a distinct species named A. rosea. 



gandavensis {R. gandavense Ar) 



Ghent Azalea 



In horticultural usage these names have 

 been loosely applied to hybrid Azaleas of 

 a very ill-defined group. In the Arnold 

 Arboretum Monograph the group, under 

 the name Rhododendron gandavense, 

 has apparently been restricted to forms 

 which have been derived from the hy- 

 bridization of A. pontica (R. luteum) 

 with the different species of American 

 Azaleas exclusive of A. occidentalis (R. 

 occidentale) and "which cannot be 

 traced to any of the binary hybrids but 

 are apparently of more mixed and uncer- 

 tain parentage." At times the Ghent 

 Azaleas have passed under the Latin 

 species name mortieri, mortieriana, or 

 morteri. 



hinodegiri (hinodigiri) 



Hinodegiri Azalea 



Following the Official Code of 1917 

 this book treats this plant as a dis- 

 tinct species although it undoubtedly 

 is a horticultural variety belonging to 

 the Kurume group of cultivated Azaleas. 

 See note under A. obtusa kiusiana. 



indica (R. indicum Cy-Ar) 



Indica Azalea 



The large-flowered greenhouse plants 

 known as Indian Azaleas are apparently 

 not derived from A. indica, but chiefly 

 from A. simsi, which is a Chinese 

 species. A indica is a Japanese species. 



— alba A. ledifolia 



— rosea . . . Sekidera Azalea 



See common-name list of Azalea on p. 27. 



— rosaeflora (A. balsaminaeflora; 

 R. indicum rosiflorum Cy; R. 

 indicum balsaminaejiorum Ar) 



Balsam Azalea 



AZALEA, continued 



japonica (Rhododendron jayonicum 



Cy-Ar) . . . Japanese Azalea 



— alba Amethyst A. 



See common-name list of Azalea on p. 27. 



— grandiflora swperba Sekidera A. 



iSee common-name list of Azalea on p. 27. 



kaempferi {R. kaempferi Cy; R. 

 obtusum kaempferi Ar) 



Torch Azalea 



ledifolia (R. ledifolium Cy; R. mu- 

 cronatum Ar; A. indica alba; A. 

 alba; A. rosmarinifolia ; A. ledi- 

 folia alba) . . . Snow Azalea 



— alba A. ledifolia 



— rosea . . . Sekidera Azalea 



See common-name list of Azalea on p. 27. 



linearifolia (R. linearifolium Cy- 

 Ar) Spider Azalea 



lutea Ag A. calendulacea 



mollis {R. sinense Cy; R. molle Ar; 

 A. sinensis) . Chinese Azalea 



This species, the true A. mollis of bota- 

 nists, is rarely, if at all, in the trade. 

 Varieties of it and of A. japonica, and 

 hybrids between the two species, con- 

 stitute the A. mollis of the trade. 



mortieri, 7nortieriana 



See note under A. gandavensis. 



nudiflora {R. nudiflorum Cy-Ar) 



Pinxterbloom 



obtusa {R. obtusum Cy-Ar) 



HiRYU Azalea 



— kiusiana {R. obtusum japonicum 

 Ar) Kyushu Azalea 



This is the wild azalea, native in the 

 mountains of the Japanese Island of 

 Kyushu, from which have been derived, 

 through long cultivation by the Japa- 

 nese, especially at the town of Kurume, 

 the many horticultural varieties now 

 becoming known as Kurume Azaleas. 

 To be classed in this group are the 

 well-known magenta-colored Amoena, 

 the crimson Hinodegiri, the scarlet 

 Kirishima, and another scarlet variety 

 called Hiryu. On this last-named va- 

 riety was based the original description 

 of Azalea obtusa. 



occidentalis (R. occidentale Cy-Ar) 

 Western Azalea 

 pentaphylla (R. pentaphyllum Ar) 



Fiveleaf a. 

 phoenicea (R. phoeniceum Ar) 



Purple A. 



BOLD-face=approved scientific names. I T Alic=synonyms or unapproved names. 



