Well, let`s count a bit.
Blueberries, chantrelles, spindly taproot, nettle, rastroot, WWW, clover, inkweed. 7 wild-growing plants for all that forests.
I`ve searched through the Internet and found out few herbs that would be right in setting.
1)Starflower(Borage) - smells like a cucumber, on collection it grants few leaves. These can be used in cooking, granting maybe more hunger fill, and as a healing extract (heals 2HHP per sip, quality doesn`t matter).
2)Plantago - on collection it grants few leaves, and then one can attach it to any free slot in an inventory. They`ll work like leeches, but they don`t drain SHP and heal a little bit more HHP. They also can be used in cooking(Garden Greens).
3)Cranberry - spawns only on swamps(leech-free ones), gives 3-7 berries per one plant. One can make a extract with it. Extract works like tea, granting stamina, but it gives no LP-buff. An alternative for noobs.
Feel free to add your wild herbs.