RHODODENDRON 



RHODODENDRON 



Glenn Dale Azaleas 



This series of 454 named cultivars was created at 

 the U.S. Plant Introduction Garden, Glenn Dale, 

 MD, by B.Y. Morrison, who became the first 

 director of the U.S. National Arboretum. The 

 project began around 1929, with the objective of 

 creating azaleas with flowers as large as those of 

 the Southern Indian hybrids, but hardy in the 

 Washington, DC, area. Many of the selections 

 met this criterion, and others equally hardy were 

 selected for different ornamental values (see B.Y. 

 Morrison. 1953. The Glenn Dale azaleas. U.S. 

 Department of Agriculture, Agriculture Mono- 

 graph No. 20, Washington, DC.) A list of the 

 Glenn Dale azalea cultivars documented in the 

 U.S. National Arboretum herbarium appears in 

 Appendix C. 



'Glory of Sunninghill' 



(Evergreen azalea) 

 FLMG 



'Golden Dream' 



(Deciduous azalea) 

 MDLT 



'Gomer Waterer' [R. catawbiense hybrid] 

 (Elepidote rhododendron) 

 SCWI 



'Gumpo' [R. eriocarpum (Hayata) Nakai] 

 (Evergreen azalea) 

 LAHG 



Helen' 



(Evergreen azalea) 

 VATA 



'Hinode giri' (often 'Hinodegiri') 



(Evergreen azalea) 

 ARPT 



* Hohman' [R. prunifolium (Small) 

 Millais] 



(Deciduous azalea) 

 DCNA 



houlstonii Hemsl. & Wils. 



= R.fortunei subsp. discolor 



'Hugh Koster' 



(Elepidote rhododendron) 

 VANB 



indicum (L.) Sweet var. tamurae Makino 

 = R. tamurae • . 



'Iveryana' 



(Evergreen azalea) 



FLMG SCMG 



japonicum (A.Gr.) Suring. 

 DCNA 



'Jean Marie de Montague' 



= 'The Hon. Jean Marie de Montague' 



'John Walter' [R. catawbiense x 

 R. arboreum ssp. arboreum] 

 (Elepidote rhododendron) 

 VANB 



kaempferi Planch. 

 Kaempfer Azalea 

 (Evergreen azalea) 



DEWG MDGD 



kaempferi x R. komiyamae 



(Evergreen azalea; natural hybrid) 

 MDGD 



kanahirae Wils. 

 Taibei Azalea 

 (Evergreen azalea) 

 MDGD 



keiskei Miq. 

 (Lepidote rhododendron) 

 DCNA DEMC 



keiskei x R. racemosum 



(Lepidote rhododendron) 

 DEWG MDKN 



'Ken Janeck' [R. yakushimanum Nakai 

 ssp. yakushimanum] 



(Elepidote rhododendron) 

 MDLT 



kiusianum Makino 

 Kyushu Azalea 

 (Evergreen azalea) 



DEWG MDGD VANB 



'Koran yuki' 



(Evergreen azalea) 

 DCNA 



'Ima shojo' 



= Christmas Cheer' 



indicum (L.) Sweet 

 Indica Azalea 

 (Evergreen azalea) 



DCNA LAAL 



LAHG 



TNSG 



'Koromo shikibu' 



(Evergreen azalea) 

 DCNA 



'Kristin' 



(Elepidote rhododendron) 

 MDLT 



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