- What are the "Blackland Prairies"? - From the website of the Nature Conservancy of Texas
- The Flora of Texas Consortium - Hosted by the Center for the Study of Digital Libraries at Texas A&M University, College Station
- All About Noxious Weeds - From the Federal Bureau of Land Management
- Noxious Weeds Home Page - From the USDA APHIS Plant Protection and Quarantine group
- Weeds of the Southern United States - Hosted on-line by the Texas A&M Agricultural Extension Service
- Broadleaf Weed Control - By Richard L. Duble, Turfgrass Specialist, Texas Agricultural Extension Service
- Grassy Weed Control - By Richard L. Duble, Turfgrass Specialist, Texas Agricultural Extension Service
- Vascular Plant Image Gallery - At Texas A&M University
- Publications of the Texas Agricultural Extension Service
- Bioregions of Texas - From the Texas Environmental Center
- Integrated Taxonomic Information System - At the USDA's web site
- Turfgrass Management and Use