Gymnocalycium bruchii

Gymnocalycium bruchii grows abundantly and forms multi-headed mats of dark green shoots that reach heights of up to 3.5 centimeters with diameters of 6 centimeters. The approximately eight to 12 (up to 17) low, straight ribs are rounded and the roots are tuberous. The one to three white or brownish central spines, which can occasionally be missing, are protruding. The twelve to 14 (up to 26, rarely from seven) thin, bristle-like, glassy white marginal spines are bent back and are 2 to 6 millimeters long. The delicate violet-pink to white flowers, which are often unisexual, are usually 3.5 to 5 centimeters long and have the same diameter. The pericarpel is short, dark brown-green and shows some light-edged scales. Stamens, styles and stigma branches are white and the pollen is yellowish. The blue-green to whitish-green fruits are spherical, pear-shaped or spindle-shaped. They are up to 1.5 centimeters long and reach 1.2 centimeters in diameter. The seeds are 1.2 to 1.4 mm long and more or less spherical.

Gymnocalycium bruchii is widespread in the Argentine province of Córdoba and San Luis at altitudes of 500 to 2000 meters.