G4T3 Apparently Secure, Infraspecific Taxon - Vulnerable
Stems erect, unbranched; scales brown, lanceolate, 3--6 × 1--1.5 mm, margins entire; leaves monomorphic; petiole brown to straw-colored, dull, 3--10 cm, 1/8--1/4 length of blade; indument of brown, narrowly lanceolate scales; blade linear, simple, 8-...
Stems succulent, hemispheric, tubercled, up to 15 cm in diameter and tall, or exceptionally taller, usually single but sometimes a few in a cluster; tubercles to 7 mm long, conical, somewhat dorsiventrally flattened, with a felted groove running the ...