Sub-species
subsp. agourensis
This perennial succulent has blue-grey leaves and an inflorescence up to 200 mm (7¾ in) tall with 1-5 branches.

subsp. costafolia

subsp. crebrifolia 
This perennial succulent has floral shoots with elliptical to spathulate leaves up to 102 mm (4in) long by 50 mm (2in) wide.

subsp. gigantea
This perennial succulent has floral shoots up to 450 mm tall and produces red flowers.

subsp. marcescens
This perennial succulent is similar to the species but the leaves whether during early summer.

subsp. ovatifolia
This perennial succulent has green foliage with maroon markings and floral shoots of 150 mm (6in) tall.

subsp. paniculata
This perennial succulent produces pale yellow flowers and has rosettes of leaves up to 20 mm wide.