Pingpong ball cactus, Button Cactus
USDA Symbol: EPMI2
USDA Native Status:
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
Plant CharacteristicsDuration: Perennial
Size Notes: 0-2 inches.
Flower: Flower about 1/2 inch across.
Bloom InformationBloom Color: White , Red , Pink
Bloom Time: Jun , Jul , Aug
Bloom Notes: Diurnal
Growing ConditionsWater Use: Low
Light Requirement: Sun , Part Shade
Soil Moisture: Dry
Conditions Comments: Minimum temperature 50 F.
BenefitConspicuous Flowers: yes
PropagationPropagation Material: Clump Division , Seeds
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Lady Bird Johnson Wildflower Center - Austin, TX
BibliographyBibref 1140 - Cacti (1991) Clive Innes and Charles Glass
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Recommended Species Lists
Find native plant species by state. Each list contains commercially available species suitable for gardens and planned landscapes. Once you have selected a collection, you can browse the collection or search within it using the combination search.View Recommended Species page
Additional resourcesUSDA: Find Epithelantha micromeris in USDA Plants
FNA: Find Epithelantha micromeris in the Flora of North America (if available)
Google: Search Google for Epithelantha micromeris
MetadataRecord Modified: 2008-10-16
Research By: TWC Staff