University of Puget Sound’s Western Washington Flora is a database of Western Washington plant species featuring photographs, Latin and common names, and species notes. The featured searches are particularly useful, listing plants found in common habitats, ranges, and elevations.
A Gardener’s Guide to Frost
A good article about predicting frost and what, if anything, a gardener can do to protect tender plants.
Decline of the Pacific Madrone
Multiple .pdf files of the publication from the proceedings of the 1995 symposium held at the Center for Urban Horticulture on the Pacific Madrone.
Identifying Gypsy Moth Early Larval Instars
Photos to identify Gypsy Moth in the caterpillar stage.
University of Wisconsin Madison Insect ID
University of British Columbia Herbarium
The UBC Herbarium is the largest in Canada west of Ottawa, home to over 650.000 plant specimens from around the world. The UBC Herbarium has five major collections: vascular plants; bryophytes (the largest collection in Canada); macroscopic algae; lichens; and fungi.
Biodiversity Explorer
Biodiversity Explorer is devoted to showing and explaining the diversity, biology and interactions of life in southern Africa.
Bellevue Utilities Department: Waterwise Gardening
A great resource on natural lawn and garden care. How to build healthy soil, find the right plants the site, and how to practice smart watering and minimize the use of pesticides.
Plantz Africa
Information about plants native to southern Africa and related topics.
King Conservation District Native Plant Publications
A four page list of nurseries and other sources for Northwest native plants.