Purpose
The site helps gardeners, beekeepers, and naturalists compare possible pollen sources. It is designed as a field-guide aid, not a laboratory color standard.
Pollen color can narrow likely plant sources, but it should be combined with season, location, nearby flowering plants, and field observation.
How to Use the Guide
Start with the color family, then compare bloom season, USDA zone, plant type, and forage value. A pollen load may include mixed pollen from more than one plant.
Use the plant pages and guide pages as a starting point for observation and verification.