Regional Sources

UT Plant Resources Center
The largest herbarium in the southwestern United States, ranking fifth among U.S. university herbaria and twelfth across the nation.

Lady Bird Johnson Wildflower Center
Includes the Native Plant Database and Image Gallery.

Plants of North Central Texas
Database of Scientific Names of Species and Subspecific Taxa (varieties and subspecies) From Shinners & Mahler's Illustrated Flora of North Central Texas.

Mints of Texas

Reference Tools

Botany Indexes 

Botanicus Digital Library
Hosted by the Botanical Society of America.

Catalogue of New World Grasses (Poaceae)
Database of nomenclature, types, synonymy, current taxonomy, and distribution for grasses occurring from Alaska and Greenland to Tierra del Fuego.

International Plant Names Index (IPNI)
Database of names and associated basic bibliographical details of all seed plants. IPNI is the product of a collaboration between The Royal Botanic Gardens, Kew, The Harvard University Herbaria, and the Australian National Herbarium.

Plants Database (USDA)
Includes names, checklists, automated tools, identification information, species abstracts, distributional data, crop information, plant symbols, plant growth data, plant materials information, plant links, references, and other plant information.

Rare Books from the Missouri Botanical Garden Library
The MBG's Rare Book Digitization Project is a searchable database of high-quality images. Contains digitized botanical texts from MBG's holdings, including botanical illustrations.

WWW Virtual Library - Botany
VL is the oldest catalog of the web, started by Tim Berners-Lee, the creator of html and the web itself. Pages are compiled by volunteers who have expertise in the topic.

Gateways

Botanical Links
Hosted by Harvard University Herbaria.

BSA Suggested Websites
Hosted by the Botanical Society of America.

New York Botanical Garden International Plant Science Center