Agave utahensis var. nevadensis (Clark Mountain agave)

Nevadensis is a variety of Agave utahensis native to limestone outcrops in California and Nevada, known in English as the Clark Mountain agave. According to the Flora of North America, the rosettes are 15-25 cm across, the leaves 15-25 cm long and 1.5-3 cm wide, the marginal teeth 4-6 mm, and the tip spine brown to whitish, slender and 4-8 cm long. The flower stalk is 2-4 m, blooming from late winter to early summer, and it grows in desert scrub at about 1,200-1,900 m. Var. eborispina has a stout ivory spine of 10-20 cm and larger teeth, so spine thickness and length separate the two. A Japanese succulent encyclopedia describes dense leaves with sharp, slightly wavy spines, the leaves a little short so the plant looks broad, and says the name 'Seijiro' refers to an even smaller type of nevadensis. The utahensis group is very prone to rot in humid heat, so summer care is the key. In Japan seedlings and seed are sold by specialist nurseries.

Source: Wikipedia (CC BY-SA 4.0)

The Agave utahensis var. nevadensis (Clark Mountain agave) grows to Rosettes 15-25 cm; tip spine 4-8 cm.

Light feeder; a little slow-release fertiliser in the growing season is enough