Regarded by some as a form of Aylostera spegazziniana. A relatively recent discovery, having been first described in 1986. Sometimes this species is confused with Aylostera supthutiana, both having similar body shape, spination and red flowers, but A. sumayana has yellowish or white stamens and mid-green coloured bodies, while A. supthutiana has red or dark pink stamens and dark green or brown bodies.

Spine length is variable, with some plants having very short spines, others longer, fine and bristly.

The description is here.

Plants of this species in the collection include:

Aylostera sumayana EH7093

Aylostera sumayana HJ1242

Aylostera sumayana JK461

Aylostera sumayana RH2088a

Aylostera sumayana RH2095a

Aylostera sumayana RH3184

Aylostera sumayana WR738