This evil is cursed in many parts of the world, by many names: puncturevine, caltrop, cathead, yellow vine, goathead, burra gokharu and bindii.
Wikipedia – Tribulus terrestris
Here’s me before meeting goathead. Happy.
And here’s my ride with at least a dozen thorns in each tire.
I was 16km out of Loreto, Baja on a coastal adventure. Happily, a taxi van was parked right where I punctured.
Cyclists hate these thorns. One guy recommends:
• thick tires with an anti-puncture strip.
• thorn resistant tire liners
• thorn resistant tubes
• slime
… I’m thinking I’ll drink beer by the pool.
besthike.com 
You think you would have learned after Peru, Rick. LOL. Stay out of the thorns!!!
Goatheads also used to be called something else, but fortunately that has fallen out of usage.
Slime is good stuff, but inadequate for Goatheads; thorn resistant tubes are a complete waste of money for any purpose. Tire liners definitely work and are highly recommended in Goathead country.