Gymnocalycium consists of cacti that may take on either a spherical or cylindrical shape, featuring ribs that are segmented into rounded tubercles adorned with spines. These plants produce funnel-shaped blooms in the early summer months.

Gymnocalycium

Gymnocalycium 'Good Orange'

Gymnocalycium 'Lincoln Rose'

Gymnocalycium ambatoense

This cactus develops clusters of short, round stems covered in tubercles, featuring white radial spines and curved brown central spines. In early summer, it produces funnel-shaped flowers that measure around 4 cm in diameter, displaying a vibrant yellow hue.

Gymnocalycium andreae

Gymnocalycium anisitsii subsp. anisitsii

Gymnocalycium anisitsii subsp. damsii

This cactus features individual, flattened-globular stems that possess 9 to 11 tubercled ribs adorned with bristle-like radial spines. In summer, it produces funnel-shaped flowers measuring approximately 4 cm across, displaying shades of deep pink to crimson.

Gymnocalycium baldianum

Gymnocalycium bodenbenderianum

Gymnocalycium bozsingianum

This clustering cactus features nearly spherical, dark green, ribbed stems that grow up to 6 cm in height and are adorned with white radial spines. In early summer, it blooms with funnel-shaped flowers that can reach 4.5 cm in diameter and are pale pink in color.

Gymnocalycium bruchii

Gymnocalycium calochlorum

Gymnocalycium castellanosii

Gymnocalycium damsii tucavocense

Gymnocalycium deeszianum

Gymnocalycium denudatum

Gymnocalycium denudatum 'Southfield Pink'

Gymnocalycium erinaceum

Gymnocalycium gibbosum

Gymnocalycium gibbosum subsp. gibbosum

Gymnocalycium gibbosum var. chubutense

Gymnocalycium gibbosum var. nigrum

Gymnocalycium horridispinum

Gymnocalycium horstii

This spherical cactus features glossy green tubercles arranged in ribs. It has five spine areoles that are positioned flat in a star-like pattern. During the summer months, it produces large funnel-shaped flowers that range from cream to pale pink.

Gymnocalycium horstii subsp. buenekeri

Gymnocalycium langunillasense

Gymnocalycium marsoneri

Gymnocalycium marsoneri subsp. matoense

Gymnocalycium megalothelos

Gymnocalycium mesapotamicum

Gymnocalycium mihanovichii

Gymnocalycium mihanovichii 'Red Prince'PBR

Gymnocalycium mihanovichii 'Yellow Prince'PBR

Gymnocalycium mihanovichii variegated (v)

Gymnocalycium monvillei

Gymnocalycium mostii

Gymnocalycium nidulans

Gymnocalycium ochoterenae

This cactus features flattened, globular stems that can reach a diameter of up to 12 cm, displaying 10 to 13 prominent tubercled ribs and sturdy radial spines. It produces funnel-shaped flowers in shades of wine-red or salmon-pink, measuring up to 5 cm across.

Gymnocalycium oenanthemum

This compact, spherical cactus reaches a height of approximately 15 cm and features a smooth green surface adorned with rigid grey-white spines. When exposed to direct sunlight, it may exhibit a subtle orange-purple hue. During the summer months, it produces large white flowers that have a slight pink center, often blooming even on younger specimens. This cactus is simple to maintain, making it suitable for various growing conditions.

Gymnocalycium pflanzii

Gymnocalycium pflanzii subsp. zegarrae

This cactus features compact, globular stems that are ribbed and tubercled, developing a bronze hue when exposed to direct sunlight. It produces funnel-shaped flowers that can reach up to 5 cm in diameter, typically white with occasional pink tinges in the center.

Gymnocalycium quehlianum

Gymnocalycium quehlianum var. zantnerianum

Gymnocalycium ragonesei

Gymnocalycium reductum subsp. leeanum

Gymnocalycium reductum subsp. reductum

Gymnocalycium ritterianum

This cactus features flattened, globular stems that are green or bluish-green in color, characterized by 10 to 30 or more prominent tubercled ribs and clusters of robust spines. In early summer, it produces broad, funnel-shaped flowers measuring about 2 cm in diameter, which are pale pink.

Gymnocalycium saglionis

Gymnocalycium schickendantzii

Gymnocalycium schickendantzii var. delaetii

Gymnocalycium spegazzini subsp. cardenasianum

Gymnocalycium spegazzinii

Gymnocalycium stellatum

Gymnocalycium stenopleurum

This compact, solitary cactus features a round, dark green body that can reach heights of up to 4 cm, adorned with slender, white radial spines. During early summer, it produces funnel-shaped flowers in a pale yellow hue that emerge from the apex of the stem.