San Antonio Rose Society 
http://www.sarosesociety.org/  

Gardening Volunteers of South Texas  
http://www.gardeningvolunteers.org/ 

San Antonio Botanical Garden 
http://www.sabot.org/

San Antonio Daylily Society  
http://www.ahsregion6.org/san_antonio.htm 

Bexar County Master Gardeners  
http://bexar-tx.tamu.edu/

San Antonio Festival of Flowers   
http://www.safestivalofflowers.com

Texas Native Trees 
http://aggie-horticulture.tamu.edu/ornamentals/natives/

Texas Forest Service 
http://texastreeid.tamu.edu/

Plant Answers.com 
http://www.plantanswers.com/

Audubon Texas – Mitchell Lake Audubon Center 
http://tx.audubon.org/Mitchell.html

Texas A&M AgriLIFE Extension 
http://aggie-horticulture.tamu.edu/