Coryphantha

A cactus whose stem elongates into a short column with age, with red glands near the tubercles. A dark central spine appears after a juvenile stage bearing only white lateral spines.

A low-growing cactus with a sunken apex and densely interwoven lateral spines. Plants with and without a central spine occur in the same group.

A spherical cactus with a highly variable central spine, sometimes entirely absent. The name Coryphantha radians, encountered in morphological and anatomical studies, now falls within this species' circumscription.

A cactus forming irregular groups of stems, with several dark central spines and whitish yellow flowers. New growth may arise from the lower and middle parts of the stem.

A small cactus with small tubercles, a dense network of thin spines and a distinct taproot. A hooked central spine appears in many plants, but not all.

A species from Coahuila with flattened, overlapping tubercles and several strong central spines. Adult plants have broad yellow flowers.

A species from Durango and neighbouring Coahuila, often forming groups of elongated stems. Its tubercles are flat and lie against the stem axis.

A small, usually solitary cactus with fibrous roots, numerous pale spines and red glands in the tubercle grooves. Flowers are lemon yellow.

A cactus from the Big Bend region and neighbouring Mexico with pale, dense armature. The spine pattern changes markedly between juvenile and adult stages.

A cactus with broad, rounded tubercles and large flowers. Individuals with bisexual and functionally female flowers have been documented in a dry-forest population in Morelos.

A species forming groups of slender, upright stems with yellowish spines. Large yellow flowers develop near the woolly apex.

A cactus with a glossy, dark green epidermis and broad tubercles. Its habit varies from spherical to distinctly club-shaped depending on the site.

A cactus with an ovoid or club-shaped stem, a thickened root and red glands near the tubercles. It has pale yellow flowers and several central spines.

A slender-stemmed coryphantha forming extensive groups through stolons. It has a taproot, loosely arranged tubercles and pale yellow flowers.

A small species from Chihuahua with a very long taproot and unusually rounded seeds. The green fruit turns red and dries after ripening.

A species with a hooked central spine and very pale flowers. Some population groups form numerous stems connected by underground stolons.

Matusz. & Šnicer

A species forming groups of cylindrical stems with short pale spines and pale yellow flowers. It is associated with limestone sites in the Jalpan region.

A species from Durango with dense, strong armature and a yellow flower with a red throat. Strong central spines obscure the woolly apex.

A cactus from northwestern Durango with a strong, curved central spine. Stems elongate with age, and tubercles become flatter.

A low-growing, offsetting cactus with an extensive taproot and much of its stem hidden underground. A field experiment showed a strong effect of mesquite shelter on the survival of five-year-old plants during warming.

A cactus forming groups through offsets from the base and older tubercles. It usually has dense pale lateral spines and at most one central spine.

A small species from Coahuila and Nuevo León with long upper lateral spines. The central spine is absent or occurs in only some areoles.

A large coryphantha with club-shaped or columnar stems, broad tubercles and red glands. It can form impressive clusters.