Ian,
in bulblog 12/03/03 you wrote: "It is often written that Corydalis are not self compatible and you need two clones to get a seed set. I do not find this to be true and as long as I pollinate the flowers with a paint brush we get a good set of viable seed to increase our stocks."
Are you sure that you successfully selfed the Corydalis or could it be, that successful cross-polination by insects had taken place? For which species do you find that they could be self-compatible under certain conditions (gametophytic self-incompatibility as in Corydalis may not be a mechanism that works for 100% of the self-pollination-attempts and may fail for instance under certain stress-conditions, even Henrik Zetterlund/Magnus Liden write, that with "a few" species rupturing of the stigma is enough to overcome self-incompatibility)?
Kind regards
Erwin