Perennials

Quadriga: The PeonyPleasureDome - All about herbaceous and tree peonies: list of cultivars with photos, care information, links to peony societies.
http://www.quadriga.net/

Alstroemeria: The Inca Collection - Information about a commercial strain of Inca lilies, including photos, usage and care.
http://www.dwarfalstroemeria.com/

Gerbera jamesonii Adlam - Gerbera or African daisy - ecological, botanical, and horticultural information, with photos.
http://www.plantzafrica.com/plantefg/gerberajames.htm

Perennials - Small collection of articles with tips on planting and care.
http://www.helpfulgardener.com/perennials/

Osteospermum.com - Information and photographs of this daisy plant that originates from South Africa.
http://www.osteospermum.com/

Chrysanthemums in Aberdeen - Addresses aspects of cultivation, exhibition, show results, and guest articles.
http://www.chrysanthemums.info

Suite101: Perennial Plants - Collection of articles on care, uses and gardening for perennial plants, by feature writers and other contributors.
http://perennial-plants.suite101.com/

Perry's Perennial Pages - University of Vermont professor offers experience and research on the subject of perennials.
http://www.uvm.edu/~pass/perry/

Floridata: Verbena bonariensis - Describes how to grow, description of habit and appearance, and natural history of plant.
http://www.floridata.com/ref/v/verb_bon.cfm

Heritage Perennials - Questions and answers, locate a local dealer, and information on perennials.
http://www.perennials.com/

Australian Acacias - Information on growing acacias in south-east Queensland from seed.
http://www.uq.net.au/~zzlstein/acacia/acindex.html

Backyardgardener: Perennial Gardening - Information and resources for perennial gardening.
http://backyardgardener.com/pren/

Gardening with Perennials - Provides photos and facts for common species and lists plants used for specific purposes. Includes instructions on cultivation and care. [English, Spanish]
http://www.urbanext.uiuc.edu/perennials/

WiseAcre Gardens - North Country perennial and wildflower photographs with plant information, virtual postcards and wallpaper.
http://www.wiseacre-gardens.com/plants/perennials.html

Gazebo Gardens - Garden tours and links, specializing in perennials.
http://members.aol.com/gazebog/gazebens.htm

Botany.com Verbena - Information on growing from seed, distribution, appearance, growing conditions, and photos.
http://www.botany.com/verbena.html

Perennials in Southern Vermont - Pictures of certain plants which thrive during certain months.
http://www.members.tripod.com/gaszek/

The Inca Collection - Information about this commercial line of alstroemeria cultivars marketed as a garden and patio plant, with photos and characteristics, care tips, and listing of garden centers selling them.
http://www.incalily.com/

Ian's Chrysanthemum Page - Tips and advice for growing, along with photographs, society details, and shows to visit.
http://web.ukonline.co.uk/i.payne/index.html

Perennials by Jojo - Weekly articles and discussions about perennials. Author is a professional gardener and propagator.
http://www.suite101.com/welcome.cfm/perennials/

General Maintenance of Herbaceous Ornamentals - Includes information and pictures.
http://ohioline.osu.edu/hyg-fact/1000/1236.html