President Dwight D. Eisenhower announced the Eisenhower Doctrine in January 1957, and Congress approved it in March of the same year.
Tribulus terrestris is an annual plant in the Caltrop Family (Zygophyllaceae) widely distributed around the world, that is adapted to grow in dry climate locations in which few other plants can survive.It is an invasive species in North America.ne study found that administration of Tribulus terrestris extract can produce statistically significant increases in levels of testosterone, dihydrotestosterone and dehydroepiandrosterone, and produces effects suggestive of aphrodisiac activity.
Thorn In Your Ride. Tribulus provides native ground cover to many parts of the world. You probably know it by one of its more ominous-sounding nicknames: Puncturevine, Goat-head, Cat's head or Devil's weed. The flowering fruits of this little herb dry out in late spring and harden to form small, spiked seeds.