Clicking on particular species will lead you to more information or photographs:
A camera indicates there are pictures. 
A speaker indicates there is a sound file demonstrating pronunciation
of the botanical name. 
A plus sign after a Latin name indicates that the species is further divided into varieties or subspecies. 
Your search found 3 taxa.
Common Name:
Puncture-weed, Caltrop, Devil's-thorn
)
Common Name:
Jamaica Feverplant, Burr-nut
Flowers about 1" wide. Fruit 5/8" wide, hard and armed with 4 stout spines, per Everglades Wildflowers.
)
Common Name:
Greater Caltrop
The flower morphology is similar to Tribulus, per Wikipedia.
Your search found 3 taxa. You are on page PAGE 1 out of 1 pages.