Roger Whitlock quibbled over my use of the word "thought" in discussing the origin of Crocus 'Dutch Yellow'. If Roger had added that the purported hybridization which produced 'Dutch Yellow' is not only thought to have occurred centuries ago but also was not recorded at the time (if in fact humans had anything to do with it), then perhaps my choice of "thought" over "known" might appear in a more favorable light. Whether he meant to or not, Roger has raised the issue of the nature of certainly in science. The word I used reflects my views on this subject; does the word "known" reflect his? Jim McKenney jimmckenney@jimmckenney.com Montgomery County, Maryland, USA, USDA zone 7 My Virtual Maryland Garden http://www.jimmckenney.com/ Webmaster Potomac Valley Chapter, NARGS Editor PVC Bulletin http://www.pvcnargs.org/ Webmaster Potomac Lily Society http://www.potomaclilysociety.org/