There is total of 17 herblores known to me in Mume. Here's the list of them, with loading spots. You'll find out the components yourself once you get the lore :)

Antidote
Loads on Hillmen Village Chief west of Dark Tower. After mixing components, you gain brown bottle, and after quaffing it, all poisons are removed from you. Also, you gain some extra poison save for some time.

Arachnia
Loads on crazed dwarf on top of Moria Walls. After mixing compnents, you gain a vial, with what you can poison your weapon or arrows. When someone is affected by arachnia poison, he will fall asleep in 2 ticks (talking about playerpoison here, mobs create poisons with less effective powers). Also, during those 2 ticks, victims moves and mana are drained.

Baker
Find lonely giant in shire, and pat him. He will guide you afterwards. Components for this lore are: sack of flour, honey, and 3 eggs. After mixing those in kit, you gain 8 bannocks.

Belladonna Poison
Loads on suspicios assassin near muranog entrance north of windsept ground. Mixing components will create a vial with mild poison (type poison), witch slows down victims regen slightly. Mostly useless.

Psylonia Poison
Loads on goblin shaman in goblin caves south east of dark tower. Mixing components will create a vial with psylonia poison. It's effects drain victims mana mostly.

Travelling
Ranger north west of neni-sul bridge teaches this lore to well-travelled persons (need 3k tps per level, lev 21 minimum). He gives a quest, which may involve following things: white bear fur, caverwing tail, sickly green mushroom, ice-demon heart. Ice-demon lives near new orc caves, white bear can be found near moria and near redhorn pass. Cavern-wings live some west of moria west gate. Sickly-green mushroom loads several places on arda (most known one is goblin caves between DT and NOC). Effects of this lore raise your moveregen and your maximum moves, so it's very useful for thieves and warriors.

Walking
Aldereon the ancient noldo who lives in elven village north of road to gh between greenholm and gh teaches this lore. You have to deliver several letters for him to different persons (the higher level, the harder target). Effects of this lore increase your moveregen for some time.

Venom poison
Loads on suspicios assassin near Mormaeg entrance north of windsept grounds. Effecs of this poison drain victims hps, victim suffers extensive damage for next couple ticks.

Soothing-Draught
Nordri the shopkeeper in blue mountains teaches this lore to anyone, who completes his quest. He will ask you to bring him items and plants, depending on your level. Effects of this lore increase greatly your hp-regen, aswell as your max hps for some ticks.

Seeing
Witch, who lives east of Fornost, may rarely load a book teaching this lore. Effects of this lore give you night vision for 24 ticks. Also, it raises your per by 2 for 24 ticks.

Shadows
Spirit that sits in library in spirit castle west of road to fornost may rarely carry book teaching this lore. Effects of this lore give you detect invisible and invisibility for 4 nights. It lowers and raises some of your stats for that time also.

Clear-thought
Bloodwight may extremely rarely load a parchment teaching this lore. Effects of this lore raise your maximum mana by 20%, and it speeds up your manaregen greatly for some ticks. After couple ticks, you experience negative effect, your max-mana is lowered, and is your manaregen for more couple ticks.

Skil-ful oil
Erestor teaches this lore to anyone, who brings him enemy dark artifact (hbm and elf-hewer should work). Effects of this lore give you +5 db and +5 ob for 4 ticks, followed by another 4 ticks with -5 ob and -5 db.

Orkish-draught
Gruksh the Orkish butcher teaches this lore only to orcs, who bring him opal or red ruby. After mixing components, you gain 'a flask of orkish draught'. Quaffing this draught gives you 15-35 moves, and you lose some hps. Pukes using draught may also get poisoned (type poison).

Drake-slumber
Loads in scaly beast area, in eastern side on the beasts (also accessible through e-priest). Prevents scaly beast from crushing down the walls in his cavern. Components are extremely hard to get, some loading at certain time of year, some are hidden.

Orc-Balm
Thrakghash the Orkish Shaman in wnoc teaches this lore to orcs that bring him a puke artifact (Sting, Glamdring etc). Gives some HP regen for some ticks.

Hemlock poison
Loads on Wuda the Dunlending Chief in dunland. Allows one to create a mild poison whichs effects include lowering str, dex and con by one and draining some hps/mana/moves of the victim.