Good point, John, but something funny is going on here. I don't know the history of the van Tubergen company well; a quick Google search turned up a citation which gives the founding date of the company as 1868. Nicolson's Gardener's Dictionary, in which the name Hymenocallis amanacaes was published, did not begin publication until 1884. Herbert, who raised the first of the spofforthiae hybrids, died in 1847. Herbert knew the plant as Ismene amancaes (and his usage is evidently not recognized for nomenclatural purposes). I suspect the 1830 date is the date for Ismene x spofforthiae, not for the later re-do of the same cross by van Tubergen which produced 'Sulphur Queen'. The dates are not making sense. Also, shouldn’t we be writing the name amancaës (to indicate a four syllable word rather than a three syllable word). Jim McKenney jimmckenney@jimmckenney.com Montgomery County, Maryland, USA, 39.03871º North, 77.09829º West, USDA zone 7 My Virtual Maryland Garden http://www.jimmckenney.com/ BLOG! http://mcwort.blogspot.com/ Webmaster Potomac Valley Chapter, NARGS Editor PVC Bulletin http://www.pvcnargs.org/ Webmaster Potomac Lily Society http://www.potomaclilysociety.org/