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Epithelantha micromeris (Pingpong ball cactus)
Cressler, Alan

Epithelantha micromeris

Epithelantha micromeris (Engelm.) F.A.C. Weber ex Britton & Rose

Pingpong Ball Cactus, Button Cactus

Cactaceae (Cactus Family)

Synonym(s): Epithelantha micromeris var. micromeris, Mammillaria micromeris

USDA Symbol: EPMI2

USDA Native Status: L48 (N)

Often clumping, globose stems up to 1 inch in diameter (2.5 cm), occasionally more; small tubercles, 1 mm long; small areoles, slightly woolly when young; 20 or more white spines, 2 mm long, longer on the top. The Button Cactus has 0.2 inch long (5 mm), 0.16 inch wide (4 mm) pale pink flowers that appear in May-June at the apex of the plant. They only partly open, as they barely stick out above the wool an spines at the top of the plant. They are followed by thin red fruit, 0.3 to 0.5 inch long

This cactus grows best in full sun in well draining soil, but it will tolerate light shade.


From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Cactus/Succulent
Size Notes: 0-2 inches.
Flower: Flower about 1/2 inch across.

Bloom Information

Bloom Color: White , Red , Pink
Bloom Time: Jun , Jul , Aug
Bloom Notes: Diurnal.


Native Distribution: Also Mexico (Coahuila, Nuevo Leon)

Growing Conditions

Water Use: Low
Light Requirement: Sun , Part Shade
Soil Moisture: Dry
Conditions Comments: Minimum temperature about 5F.


Conspicuous Flowers: yes


Propagation Material: Clump Division , Seeds

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Lady Bird Johnson Wildflower Center - Austin, TX


Bibref 1140 - Cacti (1991) Clive Innes and Charles Glass

Search More Titles in Bibliography

Additional resources

USDA: Find Epithelantha micromeris in USDA Plants
FNA: Find Epithelantha micromeris in the Flora of North America (if available)
Google: Search Google for Epithelantha micromeris


Record Modified: 2015-02-19
Research By: TWC Staff

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