樣板:United Kingdom Plant
山羊百科，林文智老師的植物、山岳、攝影紀錄
United Kingdom Plant
- Royal Horticultural Society
- Royal Botanic Garden Edinburgh Databases
- Royal Botanic Garden Edinburgh
- Edinburgh Rhododendron Monographs
- Kew Gardens
- Go Botany: New England Wild Flower Society
- Plants For A Future
- Nature Gate
- Online Atlas of the British and Irish flora
- Natural History Museum
- WILD FLOWER IDENTIFICATION GUIDE U.K.
- Nature In London
- Hypericum online
- The Plant Encyclopedia
- UK Plant Database
- Botanical.com
- BlueBell Arboretum & Nursery
- Rhododendron CLASSIFICATION
- Vireya Rhododendrons
- Hirsutum.info: About Rhododendrons, Azaleas and Vireyas; a virtual arboretum
- Rhododendronforeningen
- Plantlife Scotland
- UK Plant Database
- Flora of Scotland
- Trees Native to Scotland
- Plantlife Scotland
- Online Atlas of the British and Irish flora
- Derby City Council - Flora of Derbyshire database
- Book
- Aas, G. and A. Riedmiller 1994 Trees of Britain and Europe HarperCollins Publisher UK ISBN: 0002199939
- Lippert, W. and D. Podlech 1994 Wild Flowers of Britain and Europe HarperCollins Publisher UK ISBN: 0002199963
