Here's why:

* Southernmost Point in Texas: The southernmost point of Texas is the mouth of the Rio Grande River, which borders Mexico. This point is roughly at 25.84° N latitude.

* Southernmost Point in Florida: The southernmost point of Florida is Key West, which is located at 24.55° N latitude.

Since Key West is located at a lower latitude than the southernmost point of Texas, Texas is further south.