You found the answer, but I'll answer nonetheless. I harvested some Hymenocallis seeds few weeks back and had the same problem. I put a few in a closed jar with dried rice to draw the water from them and keep 'm stored for spring sowing; they sprouted a root nonetheless. Others just laying in a glass jar in a dark cupboard also sprouted.
In total I have about 35 seeds sown and more on the way
Problem is how to keep them growing healthy indoors during the winter
