How to Start Your Own Herbarium
This school site features details for teachers and students on collecting, pressing, and identifying local plants, and creating herbaria. Dig around their site and you'll find even more gardening, botany, and habitat gems!
A Herbarium (Fun Science Gallery)
A British site with lots of detail on collecting and identifying plants, and creating herbaria.
Lady Bird Johnson Wildflower Center (Directory of Native Plant Species)
The Center is a resource and clearinghouse for wildflower and native plant information for all regions of the country. This section is a photo-rich database of regional native plant species that you can search by common name, scientific name, and other features.
Wildflowers in Bloom
The entry for each of nearly 100 common wildflowers features a photo and details on height, planting time, blooming period, and growing conditions.