i was Googling for someting else, but saw this:
[PDF] Enviroscaping to Conserve Energy: Ground Covers for South Florida
http://www.uog.edu/cals/PEOPLE/PUBS/...NT/EH13900.pdf
File Format: PDF/Adobe Acrobat - View as HTML http://216.239.53.104/search?q=cache:S-
WhVBUdE58J:http://www.uog.edu/cals/PEOPLE/PUBS/.../EH13900.pdf+%
22attractive+cover,+but+spiny+fruit+can+penetrate+ soft-soled+footwear%22&hl=en
Page 1. Circular EES-39 The Institute of Food and Agricultural Sciences is an equal
opportunity/affirmative action employer authorized ...
http://www.uog.edu/cals/PEOPLE/PUBS/...NT/EH13900.pdf

Trilobus terrestris
- Caltrops, Puncture vine
18" S H H
Bright green leaves, yellow flowers spring through fall
X
Fast, attractive cover, but spiny fruit can penetrate soft-soled footwear, thus restricting use to areas that
do not receive foot traffic.



this weed's seed/fruit is poky enough to give a flat track to an Abrams tank