Click on a genus name to see a list of species. Select a letter on the left to see more genus entries.

Rhamnus (Buckthorn)

Rhaphiolepis

Rhododendron (defines evaluations)

Rhododendron Tri Lights™ (Tri-Lights Azalea)
Rhododendron (defines evaluations) 'Bruce Brechtbill' (Bruce Brechtbill Rhododendron)
Rhododendron '- deciduous azalea, examples' (Deciduous Azalea)
Rhododendron 'Airy Fairy' (Airy Fairy Rhododendron)
Rhododendron alabamense (Alabama Azalea)
Rhododendron 'Alice' (Alice Rhododendron)
Rhododendron 'Anah Kruschke' (Anah Kruschke Rhododendron)
Rhododendron 'Anna Rose Whitney' (Anna Rose Whitney Rhododendron)
Rhododendron 'April Glow' (April Glow Rhododendron)
Rhododendron arboreum subsp. cinnamomeum (Cinnamon Rhododendron)
Rhododendron arboreum var. roseum subsp. cinnamomeum (R. a. ssp. c. var. roseum (no commnon name))
Rhododendron 'Argosy' (Argosy Rhododendron)
Rhododendron argyrophyllum subsp. nankingense 'Chinese Silver' (Chinese Silver Rhododendron)
Rhododendron augustinii (Augustine Rhododendron)
Rhododendron auriculatum (No common name (R. auriculatum))
Rhododendron 'Beauty of Littleworth' (Beauty of Littleworth Rhododendron)
Rhododendron 'Bibiani' (Bibiani Rhododendron)
Rhododendron 'Blue Diamond' (Blue Diamond Rhododendron)
Rhododendron 'Blue Peter' (Blue Peter Rhododendron)
Rhododendron 'Boule de Neige' (Boule de Neige Rhododendron )
Rhododendron 'Bow Bells' (Bow Bells Rhododendron)
Rhododendron 'Bric-a-brac' (Bric-a-brac Rhododendron)
Rhododendron bureavii (Bureau Rhododendron)
Rhododendron campylocarpum subsp. coloxanthum (Coloxanthum Rhododendron)
Rhododendron catawbiense (Catawba Rhododendron)
Rhododendron 'Catawbiense Boursault' (Catawbiense Boursault Rhododendron)
Rhododendron 'Cheer' (Cheer Rhododendron)
Rhododendron 'Chevalier Felix de Sauvage' (Chevalier Felix de Sauvage Rhododendron)
Rhododendron 'Christmas Cheer' (Christmas Cheer Rhododendron)
Rhododendron cinnabarinum (Cinnabar Rhododendron)
Rhododendron concinnum (Concinnum Rhododendron)
Rhododendron 'Cotton Candy' (Cotton Candy Rhododendron)
Rhododendron 'Crater Lake' (Crater Lake Rhododendron)
Rhododendron 'Crest' (Crest Rhododendron)
Rhododendron 'Cunningham's White' (Cunningham's White Rhododendron)
Rhododendron 'Cynthia' (Cynthia Rhododendron)
Rhododendron 'Daphnoides' (Daphnoides Rhododendron)
Rhododendron dauricum (Dauricum Rhododendron)
Rhododendron davidsonianum (Davidsonianum Rhododendron)
Rhododendron 'Day Dream' (Day Dream Rhododendron, Biscuit form)
Rhododendron 'Delaware Valley White' (Delaware Valley White Azalea)
Rhododendron 'Dora Amateis' (Dora Amateis Rhododendron)
Rhododendron 'Dreamland' (Dreamland Rhrododendron)
Rhododendron 'El Camino' (El Camino Rhododendron)
Rhododendron 'Elisabeth Hobbie' (Elisabeth Hobbie Rhododendron)
Rhododendron 'Elizabeth' (Elizabeth Rhododendron)
Rhododendron falconeri subsp. falconeri (Falconer Rhododendron)
Rhododendron 'Fantastic' (Fantastic Rhododendron)
Rhododendron formosum var. formosum (Formosum Rhododendron)
Rhododendron forrestii subsp. forrestii (Forrest Rhododendron)
Rhododendron fortunei subsp. discolor (Fortune Discolor)
Rhododendron 'Frilly Lemon' (Frilly Lemon Azalea)
Rhododendron 'Gartendirektor Rieger' (Gartendirektor Rieger Rhododendron)
Rhododendron 'Girard's Purple' (Girard's Purple Azalea)
Rhododendron 'Goldflimmer' (Goldflimmer Rhododendron)
Rhododendron 'Grace Seabrook' (Grace Seabrook Rhododendron)
Rhododendron groenlandicum (Labrador-tea)
Rhododendron haematodes subsp. haematodes (Haematodes Rhododendron)
Rhododendron 'Hallelujha' (Hallelujah Rhododendron)
Rhododendron hanceanum (Hanceanum Rhododendron)
Rhododendron 'Hardijzer Beauty' (Hardijzer Beauty Azaleodendron )
Rhododendron 'Harry Carter' (Harry Carter Rhododendron)
Rhododendron 'Hino Crimson' (Hino Crimson Azalea)
Rhododendron 'Hinode Giri' (Hinode Giri Azalea)
Rhododendron hippophaeoides var. hippophaeoides (Hippophaeoides Rhododendron)
Rhododendron hodgsonii (Hodgson Rhododendron)
Rhododendron 'Horizon Monarch' (Horizon Monarch Rhododendron)
Rhododendron 'Hotei' (Hotei Rhododendron)
Rhododendron irroratum (Irroratum Rhododendron)
Rhododendron 'Jock' (Jock Rhododendron)
Rhododendron johnstoneanum 'Double Diamond' (Double Diamond (Johnstone) Rhododendron)
Rhododendron keiskei (Keiskei Rhododendron )
Rhododendron 'Ken Janeck' (Ken Janeck Rhododendron)
Rhododendron kiusianum (Kiusianum Azalea )
Rhododendron lacteum (Lacteum Rhododendron)
Rhododendron 'Lee's Dark Purple' (Lee's Dark Purple Rhododendron)
Rhododendron 'Lem's Cameo' (Lem's Cameo Rhododendron)
Rhododendron 'Lights Azalea Hybrid Series' (Lights Azalea Hybrids Series)
Rhododendron 'Loderi hybrid' (Loderi Hybrid Rhododendron)
Rhododendron luteiflorum (Luteiflorum Rhododendron)
Rhododendron lutescens (Lutescens Rhododendron)
Rhododendron luteum (Pontic or Pontica Azalea)
Rhododendron macabeanum (Macabeanum Rhododendron)
Rhododendron macrophyllum (Western Rhododendron)
Rhododendron 'Moonstone' (Moonstone Rhododendron)
Rhododendron 'Mrs. Furnival' (Mrs. Furnival Rhododendron)
Rhododendron 'Mrs. G.W. Leak' (Mrs. G.W. Leak Rhododendron)
Rhododendron mucronulatum 'Cornell Pink' (Cornell Pink Azalea)
Rhododendron 'Myrtifolium' (Myrtifolium Rhododendron)
Rhododendron niveum (Niveum Rhododendron)
Rhododendron 'Northern Lights' (Northen Lights Azalea)
Rhododendron occidentale (Western Azalea)
Rhododendron occidentale 'Irene Koster' (Irene Koster (Western) Azalea)
Rhododendron orbiculare subsp. orbiculare (Obiculare Rhododendron)
Rhododendron 'Orchid Lights' (Orchid Lights Azalea)
Rhododendron oreotrephes (Oreotrephes Rhododendron)
Rhododendron 'Oudijks Sensation' (Oudijk's Sensation Rhododendron)
Rhododendron 'P.J.M.' (P.J.M. Rhododendron)
Rhododendron pachytrichum (Pachytrichum Rhododendron)
Rhododendron 'Peekaboo' (Peekaboo Rhododendron)
Rhododendron 'Pink Pearl' (Pink Pearl Rhododendron)
Rhododendron 'Pink Walloper' (Pink Walloper Rhododendron)
Rhododendron 'Pioneer Silvery Pink' (Pioneer Silvery Pink Rhododendron)
Rhododendron 'Point Defiance' (Point Defiance Rhododendron)
Rhododendron ponticum (Pontic Rhododendron)
Rhododendron ponticum 'Variegatum' (Variegated Pontic Rhododendron)
Rhododendron 'President Roosevelt' (President Roosevelt Rhododendron)
Rhododendron prinophyllum (Roseshell Azalea )
Rhododendron prunifolium (Plumleaf Azalea)
Rhododendron 'Purple Splendor' (Purple Splendor Azalea)
Rhododendron 'Purple Splendour' (Purple Splendour Rhododendron)
Rhododendron quinquefolium (Quinquefolium Azalea)
Rhododendron racemosum (Racemosum Rhododendron)
Rhododendron 'Ramapo' (Ramapo Rhododendron)
Rhododendron 'Rosamundi' (Rosamundi Rhododendron)
Rhododendron 'Roseum Elegans' (Roseum Elegans Rhododendron)
Rhododendron 'Rosy Lights' (Rosy Lights Azalea)
Rhododendron roxieanum var. oreonasters (No common name)
Rhododendron rubiginosum (Rubiginosum Rhododendron)
Rhododendron 'Sappho' (Sappho Rhododendron)
Rhododendron 'Scarlet Wonder' (Scarlet Wonder Rhododendron)
Rhododendron schlippenbachii (Royal Azalea)
Rhododendron serpyllifolium (Wild Thyme Azalea)
Rhododendron serpyllifolium var. albifolrum (White Wild Thyme Azalea)
Rhododendron sinofalconeri (Sinofalconer Rhododendron)
Rhododendron sinogrande (Sinogrande Rhododendron)
Rhododendron smirnowii (Smirnow Rhododendron)
Rhododendron 'Snow Lady' (Snow Lady Rhododendron)
Rhododendron stenopetalum 'Linearifolium' (Spider Azalea)
Rhododendron 'Taurus' (Taurus Rhododendron)
Rhododendron 'Temple Belle' (Temple Belle Rhododendron)
Rhododendron 'The Honourable Jean Marie de Montague' (Jean Marie Rhododendron)
Rhododendron thomsonii subsp. thomsonii (Thomson Rhododendron)
Rhododendron 'Trilby' (Trilby Rhododendron)
Rhododendron 'Unique' (Unique Rhododendron)
Rhododendron 'Vulcan' (Vulcan Rhododendron)
Rhododendron wardii (Ward Rhododendron)
Rhododendron 'White Lights' (White Lights Azalea)
Rhododendron wiltonii (Wilton Rhododendron)
Rhododendron 'Winsome' (Winsome Rhododendron)
Rhododendron yakushimanum (Yak Rhododendron)

Rhodotypos (Black Jetbead)

Rhus (Sumac)

Ribes (Currant)

Robinia (Locust)

Rosa (Rose )

Rosmarinus (Rosemary)

Rubus

Click on a genus name to see a list of species. Select a letter on the left to see more entries.