Thylacospermum in Endl., Gen. Pl.: 967. 1840 sec. Bittrich (1993c)
- Type: Periandra caespitosa
Two species, central Asia and Himalayas. The phylogenetic placement is still uncertain. Harbaugh & al. (2010) placed it “tentatively” into Eremogoneae, while Greenberg & Donoghue (2011) and Dillenberger & Kadereit (2014) both found Thylacospermum closely aligned with Spergula; Greenberg & Donoghue (2011) considered their placement “uncertain”.