Rutaceae
Patrick Alexander
Web Links
Encyclopedia of Life
W3Tropicos
USDA PLANTS Database
Flora of North America
International Plant Names Index
Google Search Engine
Google Images
BOLD Systems - Barcode of Life Data Systems
Global Biotic Interactions (GloBI)
NCBI - National Center for Biotechnology Information
Species within checklist:
Utah State University - Logan Campus
Ptelea trifoliata
Tetradium daniellii
Zanthoxylum americanum
