Viola
 

Speaking of Viola, I am trying to grow V. verecunda v. yakusimana. I can find
it on the Web, but my question is, exactly what makes violets produce
cleistogamous flowers? I know they occur during the summer, but I would like to
know more about the mechanism, to see if I can encourage the production of
complete open flowers.
(For those who haven't met it, it is the world's smallest violet & a bonsai
companion, but very temperamental.)
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)