Mammillaria consists of spiny cacti characterized by their spherical or columnar forms, frequently growing in clusters. These plants feature numerous noticeable tubercles and produce funnel-shaped flowers that typically arrange themselves in a circle at the top of the stem.

Mammillaria pyrrhocephala

Mammillaria rekoi

Mammillaria rekoi subsp. leptacantha

Mammillaria rhodantha

Mammillaria rhodantha subsp. fera-rubra

Mammillaria rhodantha subsp. mollendorffiana

Mammillaria rhodantha var. sulphurea

Mammillaria ritteriana

Mammillaria robusta

Mammillaria ruestii

Mammillaria saboae

Mammillaria saetigera

Mammillaria sanchez-mejoradae

Mammillaria sartorii

Mammillaria scheinvariana

Mammillaria schiedeana

Mammillaria schiedeana subsp. giselae

Mammillaria schumannii

Mammillaria schwarzii

Mammillaria scrippsiana

Mammillaria sempervivi

Mammillaria senilis is a slow-growing cactus that typically reaches a height of 15 cm. It features a covering of white wool and spines. From spring through summer, it produces orange-red, trumpet-shaped flowers that can grow up to 6 cm in length.

Mammillaria senilis

Mammillaria setispina

Mammillaria solisioides

Mammillaria sonorensis

Mammillaria sphacelata

Mammillaria sphacelata subsp. viperina

This species is a compact cactus featuring rounded stems that can reach up to 5 cm in diameter. It is adorned with short spines that are either white or yellow. In spring or summer, it produces yellow flowers that measure up to 3 cm in width.

Mammillaria sphaerica

Mammillaria spinosissima is a cactus that typically features a single, cylindrical stem reaching up to 30 cm in height and 10 cm in diameter. Its surface is adorned with coarse, red-brown or white central spines, complemented by cream-colored radial spines. The plant produces carmine-pink flowers that measure about 2 cm in length.

Mammillaria spinosissima

Mammillaria spinosissima 'Un Pico Cristata'

Mammillaria spinosissima 'Un Pico'

Mammillaria spinosissima f. rubens

Mammillaria spinosissima subsp. spinosossima 'Un Pico'

Mammillaria standleyi

Mammillaria supertexta

Mammillaria surculosa is a small species that develops clusters of low, rounded stems. Each stem is adorned with fine hairs and produces prominent yellow flowers at the top during the spring season.

Mammillaria surculosa

Mammillaria tenampensis

Mammillaria tetrancistra

Mammillaria theresae

Mammillaria theresae var. albiflora

Mammillaria uncinata

Mammillaria varieaculeata

Mammillaria vaupelii

Mammillaria vaupelii var. flavispina

Mammillaria vetula

Mammillaria vetula subsp. gracilis

Mammillaria vetula subsp. gracilis 'Arizona Snowcap'

Mammillaria wagneriana

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