Is the key to anti-aging in YOUR backyard? Common weed shows promise in early study | Daily Mail Online
Ground Cover Flowering Weed With Prickers | Walter Reeves: The Georgia Gardener
Fleabane and sowthistle and groundsel, oh my! How to tell some of the common Asteraceae weeds apart. - Notes in the Margins: Agronomy and Weed Science Musings - ANR Blogs
Florida Weed ID - Gardening Solutions - University of Florida, Institute of Food and Agricultural Sciences
How to Remove Burr Weeds from Your Lawn | myhomeTURF
Spiky Balls are in My Grass!
Sandspurs: The Spiky Scourge of Feet and Lawns | HowStuffWorks