]> Botany Example of Names Published: Crucigeniella irregularis (Wille) P.M. Tsarenko & D.M. John in D.M. John, B.A. Whitton, & A.J. Brook (eds.), The Freshwater Algal Flora of the British Isles: 345. 2002. P.M.Tsarenko & D.M.John P.M.Tsarenko & D.M.John P. M. Tsarenko & D. M. John