Thelocactus are a group of cacti characterized by their ribbed, spiny stems that are typically globular or slightly cylindrical in shape. They produce prominent funnel-shaped flowers.

Thelocactus

Thelocactus beguinii

Thelocactus bicolor is a cactus characterized by its typically solitary, ribbed, globular stems that can reach up to 20 cm in height. It features elongated reddish spines and produces funnel-shaped flowers that measure up to 8 cm in diameter, displaying a rosy-purple hue.

Thelocactus bicolor

Thelocactus bicolor subsp. heterochromus

Thelocactus bicolor var. albiflora

Thelocactus bicolor var. flavidispina

Thelocactus bicolor var. texensis

Thelocactus bicolor var. tricolor

Thelocactus buekii

Thelocactus conothele

Thelocactus conothelos

Thelocactus conothelos subsp. aurantiacus

Thelocactus hastifer

Thelocactus hexaedrophorus is a solitary cactus that grows slowly, reaching a height of up to 8 cm. Its grey-green stem features thick, angular tubercles, typically arranged in 5 or 6 sides, accompanied by rigid radial spines. In the spring, it blooms with funnel-shaped white flowers, each petal adorned with a pink stripe.

Thelocactus hexaedrophorus

Thelocactus hexaedrophorus subsp. lloydii

Thelocactus hexaedrophorus var. labouretianus

Thelocactus lausseri

Thelocactus lophothele

Thelocactus macdowellii is a rounded cactus that reaches up to 10 cm in height. Its surface features conical, warty tubercles, each topped with a white, woolly areole from which white spines emerge. During spring, this cactus produces funnel-shaped flowers that can grow up to 6 cm in diameter, typically located near the apex of the stem.

Thelocactus macdowellii

Thelocactus matudae

Thelocactus mcdowellii

Thelocactus nidulans

Thelocactus phymatothelos

Thelocactus rinconensis is a solitary cactus characterized by its bluish, rounded stem that can reach heights of up to 8 cm, featuring prominent, warty tubercles. This species exhibits considerable variation in spine presence and length, with some specimens showcasing spines that can grow to 6 cm, while others may lack spines entirely. During the spring season, it produces funnel-shaped flowers that are either white or pale pink, emerging from the apex of the stem.