Not as many as you'd think, and they're all compromised by frost.
Jelly ears, velvet shank, oyster fungi.........in favourable areas. Not every edible grows every where.
I'm vegetarian, and I know my area, and without some industrious gathering and storing I'd still be damned hungry through winter on my diet if I only foraged for food. Cropped foods are a different matter.
Kale and cabbages and sprouts are good even frosted, but there's so little calorific value to them that they're best seen as taste, minerals, vitamins and roughage, than as the main food. Bit like the seaveggies really. Necessary but like rabbits you'd starve on them.
Tubers, nuts, grains, & if you're desperate roasted inner bark. Some of the rose hips might still be edible, just, and the yew ariels.
Water plants are a better bet, reedmace roots are starch rich, but you have to find an area where they grow (and you are allowed to gather).
There are plants in winter time we can eat, but there's not a whole lot of anything but the ones we've mentioned for day after day after day.
cheers,
Toddy