Comment:Prain attributes this name to "Diels, in Engl. Jahrb. xxxv. 199." [i.e. F.L.E.Diels in F.L.E.Diels & E.G.Pritzel, Bot. Jahrb. Syst. 35(2-3): 199 (1904)], thus providing a direct reference to the place of publication of Calandrinia cygnorum Diels. This is here regarded as an inadvertent new combination by Prain.