Agave horrida var. Gilbeyi

'''Agave horrida var. Gilbeyi' (Gilbey's) is a subspecies of Agave horrida and a species of Agave''.

Background
Flower about thirty, 3in. to 4in. long, 2in. broad, dark green with a pale stripe down the middle, three to four large spines on each side. Mexico, 1873.