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American Rose Society 
Membership information, local societies, and the Rose of the Month, and, American Garden Rose Selections
Botanical Society of America Online Image Collection 
Browse collections of botanical images.
Flowering Plant Gateway
Four systems of flowering plant classification.
Forage Information System 
A comprehensive resource for forage-related topics, including Extension, research, and teaching information. Produced by Oregon State University.
Garden Aesthetics
Produced by Linda Engstrom, PCC.
Garden Web 
Gardens of the world; forums and information files for gardeners.
Global Invasive Species Team 
Part of The Nature Conservancy's response to abating the damage caused to native biodiversity by the human-facilitated introduction of non-native, harmful invasive species. This website provides many resources designed to help all conservationists deal most effectively with invasive species.
How to Identify Trees
Friesner Herbarium, Butler University Tree Identification Website.
OSU Extension Service 
Gardening information.
Pacific Northwest Home Gardener 
Links and advice for the local climate.
Parasitic Plant Connection 
Browser Order/Family pages; many photos.
Plant Care.Com
Database of over 2000 indoor houseplants. Subscription required for full access.
PLANTS Database
National Resources Conservation Service, USDA. Search by state. Lists available include noxious weeds, plants endangered in the United States.
Seed Germination Database 
Browse alphabetical list from the Backyard Gardener.
Database of phylogenetic knowledge.
Last Update: 12 Jun 10:48 | Tagged with: Horticulture Gardening Trees Flowers