1) Caryophylloid dicot genus 2) Genus ariocarpus 3) Slow-growing geophytic cacti 
Ariocarpus is a genus of 8 species of succulent, subtropical plants of the Cactaceae family. The name comes from the ancient Greek `aria` (an oak type) and `carpos` (=fruit) because of the resemblance of the fruit of the two genus in acorn form. Another possibility for the origin of the name is the work Scheidweiler did on the tree Sorbus aria...
[n] - slow-growing geophytic cacti
genus Ariocarpus noun slow-growing geophytic cacti; northern and eastern Mexico; southern Texas