I have found crinum Goweni spelled with both single (i) and double (ii) . Per http://en.wikipedia.org/wiki/… The web article says: Common endings for masculine and neuter nouns are -ii or -i in the singular and -orum in the plural, and for feminine nouns -ae in the singular and -arum in the plural. The noun may be part of a person's name, ... or -i endings show that in each case Hodgson was a (different) man. Further. The following appears to be the authority of plant naming http://www.ishs.org/sci/icrabotc.htm Concerning Crinum Goweni(i). So, if Mr Gowen was the first Gowen to have his named botanically latinized two i's would be correct (Gowenii), and if he was a subsequent Mr. Gowen, then one i would be correct (Goweni)? Or the least important Gowen would perhaps only be awarded one i? So could a crinum gowenni named after JW Gowen use 1 (i) while a xxx named after the same person be double (ii) ? If JR gowen had a crinum named after him it should be a gowenii, while a crinum named after his son would then be goweni ? A further search yields a number of Gowens who were botanists. James Robert Gowen (1783-1862) , secretary of the Royal Horticultural Society from 1845 to 1850, had a plant named for him. The Gowen Cypress, Goveniana Gord also .. Gowen, James Robert (fl. 1823). Of Highclere, Newbury. 'Hy- brid AmarylUs,' Goweni is a cross of C. bulbispermum x C. zeylanicum. It is a quite distinct and unique hybrid first crossed in 1820 in England by J. W. Gowen. Capt. George Thomas Gowen, Fellow of the Linnean Society of London in 1888 and was an enthusiastic botanist gow'enii: presumably after David Gowen, volunteer at the Jepson Herbarium who has been involved in monitoring rare and unusual plants for the East Bay CNPS and is a co-contributor on the coming Jepson treatment of Eriastrum (ref. Navarretia gowenii)