Publication: Bull. Torrey Bot. Club. 27: 237. 1900.
selected vouchers: WTU
Notes: Generic taxonomy tentatively follows FNA. This genus is differentiated from Sisyrinchium by its round leaves and fused filaments (Goldblatt et al. 1990).
FNA26: var. douglasii - "Filament columns tapering evenly to base or slightly flared."