Deutsche Rhododendron-Gesellschaft e.V.
Deutsche Dendrologische Gesellschaft e.V.
Deutsche Genbank Rhododendron
C. Esveld, Boskoop - Holland
Glendoick, World Famous Rhododendron and Azalea Nursery
Chimacum Woods, A Rhododendron Nursery
Rhododendron and Azalea informationDanish Chapter of the ARS
Asperupgaard
Rhododendron Species FoundationRhododendron Species Botanical Garden
Hirsutum.info: About Rhododendrons, Azaleas and Vireyas; a virtual arboretum
Rhododendron macabeanumMark Abbott-Compton
Asianflora
Chilebosque
Chileflora
Isla (Island-Archipel) Juan FernándezFlora Partie 01 - Partie 04
nopanoniwa
Yamasaki Plant Photo Gallery
Botanic Garden, Shu Suehiro
Prof. Summer's Web Garden
Galería de helicongus, Paco Garin
C. Young's Photostream
The Gymnosperm Database
Arboretum de Villardebelle
Australian Plant Image Index
CALYPTRACURRENCY CREEK ARBORETUM
Currency Creek Arboretum, Dr. Dean Nicolle
Mount Kosciuszko, AustraliaEucalyptus pauciflora ssp. niphophila
Flora Vascular de Canarias
Naturaleza de Anaga
Rincones del Atlántico
The definitive reference toNew Zealand plants
T.E.R:R.A.I.N Native Trees & Shrubs growing locally at Taranaki, New Zealand
The New Zealand Tree Register
Plants of Hawaii, Forest and Kim Starr
OSU Oregon State UniversityLandscape Plants
Árboles ornamentales
Das Bambus-Lexikon
VIRBOGA The Virtual Botanic Garden
Nemzetközi Dendrológiai AlapítványInternational Dendrological Foundation
Monumental trees
