Echinomastus unguispinus

Scientific Name: Echinomastus unguispinus (Engelm.) Britton & Rose
Synonym: Echinocactus durangensis, Echinocactus trollietii, Echinocactus unguispinus, Echinomastus durangensis, Echinomastus laui, Echinomastus mapimiensis, Echinomastus unguispinus var. laui , Echinomastus unguispinus var. durangensis , Neolloydia durangensis, Neolloydia unguispina, Pediocactus unguispinus, Sclerocactus unguispinus, Sclerocactus unguispinus var. durangensis , Thelocactus durangensis, Thelocactus unguispinus
Family: Cactaceae

Origin: Mexico (Chihuahua, Coahuila, Durango, San Luis Potosi, Zacatecas)

Growth Habits: Solitary, globose to short cylindrical pale blue-green stems, 4 to 5.6 inches tall (10-14 cm), 3.2 to 4.4 inches wide (8-11 cm); 13 to 21 low tuberculate ribs; circular areoles woolly when young, 0.6 to 0.8 inch apart (1.5-2 cm); 4 to 9 reddish central spines, about 1.2 inches long (3 cm), the lower one larger, oriented toward the bottom; 21 to 51 whitish to yellowish radials, 0.8 inch long (2 cm), obscuring the stem, upper ones slightly larger.

Blooming Habits:
Reddish brown flowers on young areoles, 1.1 to 1.2 inches long (2.8-3 cm), 0.8 inch in diameter (2 cm). Fruit with a few scales. Black seeds, 2 mm long.