Rogan,
Very very strange. I have been growing G.hispidula for a few years and since
it reached maturity it has been flowering nearly constantly. Seed production
is prodigious, and has managed to infect many other pots with seed. These
subsequently germinate and so G.hispidula is now on my list of greenhouse
weeds along with things like P. lusitanica, U.subulata, U.arenaria,
U.bisquamata, and D.peltata!
Barry