Lobivia Ferox
Very large and spiny cactus, solitary or branched. The body is almost concealed by the spines. This is a very variable species especially in shape and  and length of  spines and in flowers colour.
Stem: Bluish-green, spherical at first and later sort of cylindrical, and it may grow 25 cm tall and 10-40 cm in diameter.
Ribs: 25 to 50 ribs deeply incised between the tubercles, which are approx. 2 cm long.
Spines: Radials are hard to tell from the central spines. Each areole bears approx 4 to 15 spines ranging from slender to thick, conical with a wider base, and irregular in length, the longest up to 8 cm or more. They are flexible and curved upward, and those on new parts of the plant have occasionally a hooked tip. Their colour varies from yellowish to brown when young, but later grey.
Flowers: Lateral or basal, 7-10 cm. long, funnel-shaped, and have a slender, curved tube covered with long white hairs. Perianth segments are short and white, but can be of almost any colour.
Fruit: Globular, dark green with flowers remnants.  The fruit has a whitish mucilaginous pulp  and is edible with a fresh and agreeable taste