The bottom of the fruit tube has large ovate shallow pits alternating with five prominent radial veins (from the navel to the tepals).

[1] Halothamnus bottae has been first described in 1845 by Hippolyte François Jaubert and Édouard Spach (in Illustrationes plantarum orientalium, volume 2, pl.

[1] It consists of two subspecies:[1] Halothamnus bottae is endemic on the Arabian peninsula (Saudi Arabia, Yemen, Oman, United Arab Emirates).

It grows in open shrubland and semidesert on dry stony ground, from 0–2000 m above sea level.

niger occurs only on southern Arabian peninsula, in hot arid lowlands up to 100 m above sea level (similar plants from eastern Africa belong to Halothamnus somalensis).