fishhook cactus, Mammillaria grahamii
Fishhook cactus is conveniently small. The flowers here aren't much more than a half inch across. That size makes this a very easy plant to accomodate in a terrarium or other indoor medium. The ring a pink flowers is worth that effort, but even without those the hooked spines make these interesting. Just remember that even with the hooks, this can still give you a jab. Only a few spines at each locus are hooked. The rest are ready to fend off trouble. Fishhook cactus comes from arid areas of AZ, CA, NM, and TX. Cultivated, Lenawee Co MI, 3/30/15.