Steyermark in his Flora of Guatemala noted the C. longifolium was an introduced species from South Africa originally described under Amaryllis longifolia. C. longifolium is now synonymous with C. bulbispermum as more than likely is the plant seen in the 4th PDF down here (http://www.phytologia.org/vol88no2.html). Crinum bulbispermum likely varies over its range like many other plants. I have plants grown as C. delagoense that to me seem to be C. bulbispermum, but with nicer flowers. What is the origin of your plants/seed? Aaron