The rather small flowers are often followed by attractive
red fruits, which contrast nicely with the spines
 

E. micromeris (forma texensis) cristata
 

The cause of cresting: The cause of cresting is not fully explained.   Biologists disagree as to why some plants grow in this unusual form.  Some speculate that it is a genetic mutation. Others say it is the result of a lightning strike or freeze damage. But whatever the stimulus, the growth point of the stem has switched from a geometric point to a line, which folds and undulates as the crest expands. Though these crested cacti are somewhat rare (1 in 50,000 or less), cresting occurs naturally and can be encountered in many other cactus species.

Cultivation: Although regarded as a choice and difficult plant, in cultivation it is relatively easy.  It needs a very coarse potting soil that drains well (rot prone).  Water sparingly.
Sun Exposure: These plants like full sun, but some summer shade in during the hottest hours of the day is beneficial.
Frost Tolerance: Depending on the variety, it will take -12° C,  but for safe cultivation a minimum temperature of 5° C  would be recommended

Propagation: Grafting, cuttings.

Photo of conspecific taxa, varieties, forms an cultivars of Epithelantha micromeris:

• E. micromeris
• E. micromeris var. dickisoniae
• E. micromeris var. polycephala
• E. micromeris var. rufispina
• E. micromeris var. unguispina
• E. micromeris cv. ping-pong
• E. micromeris forma cristata

Conservation status: Listed in CITES Appendix II