I have a number of bulbous Corydalis species and selections, some from Ruksans and a few given me long ago by Henrik Zetterlund. A few of them do self-sow, and I think the seedlings of a single clone are true, notably C. henrikii and C. schanginii ssp. ainae. I have read that the seeds have short viability so I just let them drop in the raised beds where they grow. However, I have raised a few species from stored seed; usually only one seed from a packet will germinate, and this is typical of short-lived seeds, which are always worth sowing even if they have that reputation. Most of the Ruksans named forms are color selections of C. solida, and not all of them are really distinctive. They multiply quickly, as is typical of C. solida in gardens in this area (western Oregon). There is also a selection, I'm not sure if it's solida or a hybrid, called 'Beth Evans', which is widely available in garden centers now. It is smaller than typical C. solida and soft pink in flower, and multiplies very rapidly. Some of the bulbous species do not multiply rapidly; I think a few of them don't offset or split at all, but rather the tubers (not bulbs) just get larger year by year. I used to keep them in plunged pots, but now I have them in raised beds and they immediately became much larger and more floriferous. Some kinds send out their stems horizontally below the soil surface; I was hoping they were forming offsets along the stems, but I haven't found any so far. An interesting thing about Corydalis when you see them in the wild is the color variation within a population. On a recent trip to Azerbaijan and eastern Turkey, we had some discussions about whether we were seeing one or more species flowering in the alpine meadows, but I think it was just one, probably one close to C. oppositifolia. Jane McGary Portland, Oregon, USA