plants and herbs Geralt can gather and use in The Witcher games are not unique to the game. Even in the first book translated to English, , there are mentions of numerous plants.
In the short story " The Last Wish The Witcher", a couple are mentioned as ingredients of potions, but most of the mentions occur in the sixth part of the framing story, " The Voice of Reason" where Nenneke discusses the plants found in the grotto with the witcher and climate change in the world.
Some of them can easily be matched with the plants found in the game, but not nearly all of them. A good number of them are also plants found in the real world.
Absenta Artemisia absinthium, or wormwood, used in aphrodisiacs (also known as absinthe)
Acacia "the acacias along the road to town"
Arenaria "shoots of arenaria strewn with berries as red as blood"
Aspen "you should burn juniper, broom and aspen in the fireplace"
Banewart possibly deadly nightshade
deadly nightshade that when mixed with hellebore, hemlock, sulfur, pitch and tacks, becomes poisonous
Bohun Upas a tree with poisonous sap
Broom "you should burn juniper, broom and aspen in the fireplace"
Celandine a common plant with medicinal properties
Conynhaela magical root with healing properties, used with purple living bone
Damiana small flowering shrub whose blooms are used in aphrodisiacs
Eucalyptus "greenish mush smelling sharply of eucalyptus"
Eyebright found in alpine or sub-alpine meadows where snow is common, used to treat eye infections
Fastaim "the meaty, thickly-veined leaves of fastaim"
Hawthorn likely Hawthorn (Crataegus)
a plant that when mixed with hellebore, belladonna, sulfur, pitch and tacks, becomes poisonous
Hemp "'A field of this size emits a strong aura against magic. Most spells will be useless here.'"
Hops "'Those are hops — their pollen has the same effect.'"
Juniper "you should burn juniper, broom and aspen in the fireplace"
Knitbone magical plant with healing properties, used with conynhaela
Mandrake root with magical properties
Measure-me-not "the crimson-golden ovals of measure-me-nots"
Melilote "stretches of star-leafed melilote"
Monk's hood also known as "wolfsbane", is a druids' herb.
Monkshead possibly a type of lily, but also possibly a variant name for monk's hood
Mousetail orchid "the tiger-striped petals of the mousetail orchid"
Pondblood moss "pinnated pondblood moss huddled against stone blocks"
Puffhead "compact balls of puffheads pouring out of huge flowerpots"
Raven's eye "the glistening tubers of raven's eye"
Sand-spurry flybush "huge pinnated leaves of sand-spurry flybush"
Sawcut "the dark arrows of sawcuts"
Spurge annual or perennial herb, woody shrubs or trees with a caustic, poisonous milky sap
Stramonium is known as the hallucinogenic "jimsonweed"
True-love possibly "love-lies-bleeding"
Veratrum interestingly also known as "false hellebore"
Subterranean plants [ ]
Reachcluster "reachcluster, an antidote to every known toxin and venom."
Scarix "The modest yellow-grey brushes peering from chests deeply sunken into the ground revealed scarix, a root with powerful and universal medicinal qualities."
Sewant mushroom "In the shady part of the grotto bulged caps of the sewant mushroom, grey as the stones in a field."
Aqueous plants [ ]
Bitip "Glass reservoirs full of gnarled rhizomes of the hallucinogenic bitip"
Cryptocorine "slender, dark-green cryptocorines"
Hornwort "vats full of hornwort"
Liverwort "tanks covered in a compact skin of liverwort, fodder for the parasitic giant oyster."
Turtle duckweed probably tiny green water plants which tend to grow on the surface of ponds
Organisms [ ]