Family Guide for Fruits and Seeds
Federal Noxious Weed Disseminules of the United States
Seeds of South Australia, Seed Identification Guide
BrassiBase, Key to Brassicaceae Genera
Fruits and Seed of Legume Genera of the World
Identifying Commonly Cultivated Palms
Key to propagules of selected weedy Asteraceae (daisy or sunflower family)
Global Biodiversity Information Facility