University of Hawaii Tropical Plant and Soil Sciences website

The Ecology, Evolution and Conservation Biology Graduate Specialization at the University of Hawaii

Dr. DeFrank's Weed Science Website

Native Plants for Hawaii's Roadways

USDA NRCS Ho'olehua Plant Materials Center

Honolulu Star Advertiser: Roadside redo (roadside revegetation with native Hawaiian plants)

Hawaii News Now: Hawaii Dept. of Transportation looks to native plants to beautify freeway hillsides