Pingpong Ball Cactus

Names and Synonyms

Common Names

• Pingpong Ball Cactus

Scientific Names

Accepted name

Synonyms

• Cactus leucodictius
• Cephalomamillaria micromeris
• Cactus micromeris
• Cactus leucodasys
• Mammillaria leucodasys
• Mammillaria leucodictia
• Mammillaria micromeris
• Epithelantha petri

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae within the phylum Streptophyta and is classified under the class Equisetopsida. As a member of the subclass Magnoliidae and the order Caryophyllales, it is situated in the family Cactaceae. Finally, it is identified by the genus name Epithelantha.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is primarily distributed across the southwestern and south-central regions of the United States. Within the southwestern United States, it can be found specifically in the state of Arizona. Moving toward the south-central United States, the species inhabits parts of New Mexico and Texas. Its range also extends southward into the country of Mexico. Specifically, in Mexico, the plant is located within the northeastern region.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Life history

The life history of Epithelantha micromeris is characterized by a perennial lifecycle, allowing the plant to persist in its environment over multiple growing seasons. As a perennial species, it does not rely solely on a single reproductive event to ensure species survival but can undergo repeated cycles of vegetative growth and flowering. This sustained biological strategy enables the plant to establish more robust root systems and accumulate greater energy reserves over time compared to annual or biennial counterparts. By maintaining a continuous presence in its ecological niche, the plant can better navigate seasonal fluctuations and optimize its reproductive output across different years.

Lifecycle :

perennial

Morphology

The morphology of Epithelantha micromeris is characterized by a growth form classified as a shrub, functioning as a self-supporting plant rather than a climber or liana. It exhibits a non-woody structure, lacking the significant lignification found in larger woody species. In terms of its ecological positioning, the plant is terrestrial in nature, neither functioning as an aquatic or semiaquatic organism nor acting as an epiphyte. Furthermore, it is an independent species, showing no parasitic tendencies such as obligatory or facultative dependency on a host.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

shrub

Parasite :

independent

Woodiness :

non-woody

Reproduction

The reproduction of Epithelantha micromeris is characterized by the production of exceptionally small seeds, which play a critical role in its dispersal and survival strategies. Quantitative analysis of its reproductive output reveals a highly consistent seed morphology, with a recorded seed mass mean of 0.00062 g. This uniformity is further evidenced by the fact that both the maximum and minimum seed mass values are identical at 0.00062 g, indicating a very low level of variance in the mass of the individual seeds produced. Such minute seed dimensions suggest a reproductive strategy optimized for wind dispersal or colonization of small microhabitats within its ecological niche.

Seed mass mean:

0.00062 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Epithelantha micromeris has 2 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include BETA-SITOSTEROL, OLEANOLIC ACID.

BETA-SITOSTEROL

1. Lloydia

OLEANOLIC ACID

1. Lloydia

Activities

Epithelantha micromeris has 1 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Toxic.

Toxic

1. Lloydia