Trillium grandiflorum seeds are just beginning to germinate! As well is Paris quadrifolia; I noticed the first signs last Saturday (with my x40 lens).
I snapped a few pictures when I was packing some today; they are advanced enough to be noticeable even if the pictures are not great.
No matter what someone else says/writes, this is happening every year.
For these species, moist stored seeds kept at warm will always start to germinate around this time (roots only).
From all T. grandiflorum seeds, 70-80% will germinate now (roots) and then show the first leaves in the spring after a period of cold stratification. The rest will need a cold/warm cycle to go through the same cycle.
Paris quadrifolia seeds were also tested two years ago and at that time they all germinated by November (this year I only got few and were promised to someone).
On short, hurry up if you think about Trillium grandiflorum; right now I can select and send seeds that are just about to germinate (they are enlarged and lighter in colour – see the feature image).