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• About.com: Trumpeting Trumpet Vines on the Landscape - Information about trumpet vines and how to attract hummingbirds with flowing vines.
• Copihue or Chilean Bellflower, Lapageria rosea, The - Describes history, cultivation, and cultivars, also provides photographs.
• Eastcheam Ivy - Contains information about different species of the plant along with photographs and resources.
• Hoya - Tips on culture, germination and care. Information on the species history, native habitat and systematics. Includes a larger photo gallery with photos of flowers, whole plant and leaves.
• Ivyfile - Ivy encyclopedia with cultivars, illustrations, and nursery sources.
• Luffa.info - Information and photopgaphs about luffa sponge gourds.
• Passion Flowers - Information about Passiflora collection with tips on growth and care in the UK climate.
• Poison Ivy, Oak & Sumac Information Center - Pictures of various poisonous plants with pictures. Includes facts, remedies, treatment, question and answers, and FAQs.