Ariocarpus RETUSUS 'JAUMAVE'

Ariocarpus RETUSUS 'JAUMAVE' - Jaumave living rock cactus, Ariocarpus retusus 'Jaumave'.

Ariocarpus is a genus of distinctive and original cacti in the family Cactaceae, comprising about 8 species distributed across northern and central Mexico. These plants stand out for their unusual appearance and lack of spines, allowing them to often blend into the surrounding rocky landscape.

All representatives of the genus are extremely slow-growing succulents that develop a massive radish-like taproot. Instead of ribs, they possess fleshy triangular tubercles that perform the photosynthetic function. The leaf-like structures covering the body are closely appressed to one another, forming a dense star-shaped rosette. Most species lack distinct areoles and are devoid of spines, making them vulnerable yet visually unique.

Ariocarpus bloom, depending on the species, from late summer to late autumn, and the fruits ripen in early spring of the following year. The fruits are smooth, fleshy berries of rounded or elongated shape, 0.5-2 cm (0.2-0.8 in) in length. They are white, greenish, or reddish, initially juicy, and upon ripening wrinkle and disintegrate, scattering seeds into the apical wool.

All species are included in lists of protected plants and are under conservation protection. Certain forms occur exclusively in limited territories. In their natural habitat, they grow on rocky slopes in the light shade of shrubs and grasses, where they obtain moisture less from rainfall than from morning dew.

Jaumave living rock cactus is a local form with a compact, flattened-globose body up to 10 cm (3.9 in) in diameter. The tubercles are widely spaced, triangular, and obtuse at the apex. The color is dark green with a glaucous bloom. The surface is smooth, areoles are inconspicuous, and there are no spines.

It blooms in autumn. The flowers are bright pink, large, up to 5 cm (2.0 in), funnel-shaped, opening in the center of the rosette. The fruits are elongated, reddish, developing beneath the epidermis and emerging through the areoles after ripening. The seeds are large, black, and rough.

Sowing ariocarpus generally does not require advance preparation, although some specialists recommend cold stratification of the seeds for 2-3 weeks at a temperature of 5-6 °C (41-43 °F). The seeds are mixed with moist sand (3:1) and kept in a refrigerator uncovered. This helps the embryo mature when tissue development is incomplete.

A sterilized substrate is used for sowing: leaf mold and sand or peat and sand (1:1), with a top layer of coarse sand or brick grit. Sowing is carried out superficially, without covering. Containers are covered with glass or film and kept at a temperature of 20-25 °C (68-77 °F), dropping at night to 18-20 °C (64-68 °F).