*Some answers from Ian Young to points made.... * "Gordon Hogenson (/Tue, 05 Jan 2016 18:10:20 PST/): In general, I have heard that Erythronium cross easily, although I don't know if this applies only to closely related species. I don't know what species will cross with which other species, or if all of them will potentially cross-pollinate. Did Ian hand-pollinate the montanum strains, or otherwise isolate them? Gordon" Ian: I hand pollinates these, Gorden and take what measures possible to protect them. Some species are promiscuous - californicum, revolutum, oregonum, hendersonii for instance. Some species will cross in the wild it seems - while many are not amenable to hybridise - I have made several attempts in such hybrids and failed. The phylogenetic trees gives a hint as to which species might cross with their closely related species. "Jane McGary (/Tue, 05 Jan 2016 18:41:08 PST/) Some people interested in Erythronium think that the narrow endemic Erythronium elegans arose as a hybrid of E. montanum and E. oreganum. I don't know whether this view is still widely held." Ian : I think ( as does Brian Mathew) that the speculation is that elegans is a hybrid of montanum and revolutum .... an ancient stable hybrid. E. elegans turns pink at a very early stage of growth which suggests there is revolutum blood in it. All speculation, of course. Hope this helps, M. Young