Hi, Mark. I don't know of a good source for Fritillaria seeds, especially the North American ones. You could check the Sources list on the wiki; some of the companies listed there may have a few species. The availability of western US (especially Pacific coast) wildflower species seed is very poor these days. The old sources have faded away. It's depressing, so I try not to dwell on it. When you do get your frits, think carefully about summer water. Unlike Calochortus and most other California bulbs, the frits seem to prefer to get a bit of moisture in the summer. In the ground, natural soil moisture may be enough, depending on how deep the bulbs are. But in pots I've definitely killed a lot of species by letting them go totally dry in the summer. Good luck, Mike San Jose, CA