Drymaria, Syst. Veg. ed. 15bis 5: 31, 406. 1819 sec. Bittrich (1993c)
- Type: Drymaria arenarioides
- =Pinosia in Ark. Bot. 23A(5): 70. 1930 syn. sec. Duke (1961)
- Type: Pinosia ortegioides
About 50 species, all but two found only in the New World. Little is known about relationships within Drymaria; Duke's (1962) preliminary revision in which he described, but did not validly publish, 17 series is the only recent, comprehensive study. Greenberg & Donoghue (2011) included all four sampled taxa and show a poorly resolved, possibly polyphyletic genus.