Ariocarpus trigonus (Star Rock)
Ariocarpus trigonus(F.A.C.Weber ) K.Schum . Living Rock , Star Rock Anhalonium trigonum , Ariocarpus retusussubsp.trigonus , Ariocarpus trigonusvar.minor Photo via ginsio.com Family : CactaceaeSubfamily : CactoideaeTribe : CacteaeGenus : Ariocarpus Ariocarpus trigonusis aboriginal toMexico . It grows in jolting limestone areas at elevations pasture from 1,970 to 3,940 feet ( 600 to 1,200 m ) in Tamaulipas and Nuevo Leon . Ariocarpus trigonus , also roll in the hay asAriocarpus retusussubsp....