Ferocactus flavovirens

Ferocactus flavovirens forms clusters with plants growing up to 1 meter tall and more than 2 meters wide, with numerous spherical to cylindrical shoots. These shoots are light or gray-green, reaching heights of 30 to 40 cm (12 to 16 in) and diameters of up to 40 cm (16 in), with 13 sharp ribs and widely spaced areoles. The needle-like spines are light brown to gray, with the higher spines occasionally lighter and bristle-like. It has four to six central spines up to 8 cm (3.1 in) long, with the lowest directed downwards, and 12 to 20 radial spines. The funnel-shaped, yellow to yellowish-red flowers emerge from younger areoles at the shoot tip, reaching lengths of up to 3 cm (1.2 in) and diameters of 2.5 cm (0.98 in). Its ellipsoid fruits are up to 2.8 cm (1.1 in) long, red, and covered in long, brown, bristly-tipped scales.

Ferocactus flavovirens is a clustering cactus that grows in Mexico's Puebla and Oaxaca states on dry limestone hillsides.