Turbinicarpus pseudopectinatus is a dwarf, globular cactus with a stem completely divided into hatchet-shaped tubercles, which bear linear areoles. This species has about 50 tiny, white “radial” spines, which measure up to 0.2 centimetres in length and are spread out horizontally, in a comb-like arrangement. Unlike some other Turbinicarpus species, Turbinicarpus pseudopectinatus lacks central spines (2).
Turbinicarpus pseudopectinatus may be confused with two other Mexican cactus species that also have pectinate spines, Mammillaria pectinifera and Pelecyphora aselliformis. However, the flowers of Turbinicarpus pseudopectinatus arise from the top of the tubercles, while in the other two species the flowers are borne at tubercle axils (the points at which the tubercles meet the stem of the cactus) (2).
- Diameter: up to 3 cm (2)