Sphaerocoma in J. Proc. Linn. Soc., Bot. 5: 16. 1861 sec. Kool & al. (2012)
Monotypic; in deserts from Somalia east to Pakistan. Kool & al. (2012). They noted that Sphaerocoma is sister to the monotypic Pollichia and together they form a sister clade to one including Polycarpaea and Polycarpon.