Passion Flowers  
   Information about Passiflora collection with tips on growth and care in the UK climate.
   http://www.passionflow.co.uk

Copihue or Chilean Bellflower, Lapageria rosea, The  
   Describes history, cultivation, and cultivars, also provides photographs.
   http://www.lapageria.com/

Eastcheam Ivy  
   Contains information about different species of the plant along with photographs and resources.
   http://www.eastcheam.co.uk

Ivyfile  
   Ivy encyclopedia with cultivars, illustrations, and nursery sources.
   http://members.tripod.com/~Hatch_L/hede1616.html

Poison Ivy, Oak & Sumac Information Center  
   Pictures of various poisonous plants with pictures. Includes facts, remedies, treatment, question and answers, and FAQs.
   http://www.poisonivy.us/

Hoya  
   Tips on culture, germination and care. Information on the species history, native habitat and systematics. Contains a larger photo gallery with photos of flowers, whole plant and leaves.
   http://www.hoyor.net/

About.com: Trumpeting Trumpet Vines on the Landscape  
   Information about trumpet vines and how to attract hummingbirds with flowing vines.
   http://www.landscaping.about.com/cs/groundcovervines/a/flowering_vines.htm