Science magazines
- Tan Riffleshell
- Tar River Spinymussel
- Tectaria estremerana
- Telephus Spurge
- Tennessee Purple Coneflower
- Tennessee Yellow-eyed Grass
- Terlingua Creek Cat's Eye
- Ternstroemia Subsessilis
- Tetramolopium Arenarium
- Tetramolopium Filiforme
- Tetramolopium Lepidotum Ssp. Lepidotum
- Tetramolopium Remyi
- Tetramolopium Rockii
- Texas Ayenia
- Texas Bitterweed
- Texas Blind Salamander
- Texas Poppy-mallow
- Texas Snowbells
- Texas Trailing Phlox
- Texas Wild-rice