Mammillaria wrightii Engelm.  
Family: Cactaceae
Wright's Nipple Cactus,  more...
Mammillaria wrightii image
Frank Rose  
Mammillaria wrightii
Mammillaria wrightii image
Ries Lindley  
Mammillaria wrightii image
Ries Lindley  
Mammillaria wrightii image
Ries Lindley  
Mammillaria wrightii image
Sue Carnahan  
Mammillaria wrightii image
Patrick Alexander  
The National Science Foundation
This project made possible by National Science Foundation Award 1410069