lant effects (magical & natural) (save vs. poison for all)
Plant		type			           effect:
Ash 		tea(bark)  Aspirin		Removes pain for 12 hours			
Blue Tonic	raw				energy boost (12 hours) no food for 1 hour
              					       or suffer intense pain for 1-4 hours 
 						       movement rate to 3, can’t attack
Boneset	flower (moonless night harvest)  cures 3d6 hp, gains +4 bonus vs. fear
Boneset	Elixir	Boneset elixir		cures 1d4hp
Boneset	Tea	Boneset tea		50% chance of cure 1 hp per pint
Cardamon	Ointment  Wintersalve		+1 on save vs. cold attacks. 
Felamour	dried leaves (smoked)		+1 Str, -2 Int, -2 Wis (for 1d4 hours						                   10% chance for hallucinations.
Gentian	Poultice Venompurge		neutralizes non-magical snake venom
Graveolens	Ointment  Lycanthropebane	adds +2 to save vs. lycanthrope within hour
						        inflicts 1d3 hp of dmg.
Mixed		Tea	Lycanthrope cure	50% chance of cure from lycanthropy within
  Belladonna/Wolvesbane/Graveolens		        24 hours of infliction. (one use per 						        infliction regardless of success)
						        renders drinker unconciocious 1d4 days
Redoil		Poultice   Woundpack		cures 1 hp per ounce applied to wounds
Hushthorn	Tea	Sleeptea		puts victim asleep for 2d10+13 hours
 
Herbs, Spices, and Medicinal Vegetables
	The following is a list of some plant materials and their reputed uses.  I use this list to manufacture balms, teas, poultices, and wound packs for herbalism realism.  Very few of these items actually had benefit, but many were believed to have benefit.  Many of these cures can act as Poisons if taken in high enough dose. (Belladonna, Wolvesbane, etc.)   These have no game effect other than adding flavor and realism, unless specifically noted otherwise.
Non-Magical Plant or Special Part:	Uses and/or Powers
Abcess Root (sweet root )		respiratory disorders
Acacia (Gum Arabic )			tissue Repair
Aconite(wolvesbane, monkshood)	sedative, ward for werewolves
Acorn					tissue hardening
Adder’s Tongue			balm
Adrue					anti-vomiting, sedative
Agar-agar (jelly)			anti-inflammation, nutrient
Agaric					astringent, purgative
Agrimony (cocklebur, stickwort)	muscle toner, diuretic
Alder					anti-inflammation, tonics
Alkanet root				balm, anti-septic, wormier
All-heal (wound-wort)		anti-septic, anti-spasmodic
Almond milk/powder			nutrient, balms
Aloe					bites, burns, laxative, tonic, insect repellent
Amaranth (red cocksthumb)		astringent, anti-hemorrhaging
Ammoniacum (Persian Gum)		stimulant, respiratory aid
Angelica				lungs, liver, spleen, vision, hearing
Anise					antacid, digestion, coughing
Arbutus (mayflower)			astringent, bladder infection
Areca nut (bethel nut)			astringent, tape wormer
Arenaria rubra (sandwort)		diuretic, urinary disease
Arrach (goosefoot)			sedative (nervous tension or hysteria)
Artichoke juice			jaundice curative
Asafetida (gum asafetida, devils dung)   aphrodisiac, brain and nervous stimulant, tonic
Asarabanca (hazelwort, wild nard)	balm, purgative
Ash (bark and leaves)			laxative, anti-inflammation, fever
Asparagus (juice/root)			sedative, heart problems/anti-oxalic acid
Avens (Colwart, herb bennet)		astringent, anti-hemorrhaging, anti-weakness, tonic
Bael					anti-inflammation, ulcers
Balm (sweet balm) leaves		calms nerves, fevers
Balm of Gilead			nutrient, organ stimulant (general)
Balmony (bitter herbs, snake head)	tissue builder, strengthener, liver ailments, wormer
Barley					nutrient (recuperative)
Basil					nervous disorders
Bay leaf				?
Beet					organic cleanser
Belladonna (deadly nightshade)	diuretic, sedative, lycanthrope and poison cure,
	dwale, black cherry root)	pain reliever, anti-opiate, circulation stimulant
Benne (sesame)			respiratory disorders, eye infections
Benzoin (gum benzoin)		stimulant, anti-septic, wounds and sores
Berberis				fevers
Beth root (lamb’s quarters)		astringent,  coughs, anti-hemorrhaging, tonic
Bilberry (huckleberry, whortleberry)	anti-thirst, dropsy, typhoid
Birch (white birch)			Venereal Disease, skin conditions, intestines
Birthwort				Circulatory stimulant
bistort (adderwort)			astringent
Bittersweet (felonwort)		abscesses, lymph infections, swelling
Blackberry (dewberry)		astringent, tonic, dysentery
Black currant				diuretic, anti-septic, blood purifier
Black willow (pussywillow)bark	astringent, antiseptic,
Blueberry (see bilberry)
Blue Flag (water lily, water flag,)	diuretic, cathartic, blood purifier, VD, wound healer
Blue Mallow (common wallow)	coughs, colds
Blue Tonic				exhaustion, hunger, cold, anemia, fever, stimulant
Boneset (thoughtwort)		fevers, tonics, skin diseases
Borage 				coughs, lung infections
Box leaves				tonic, blood purifier
Bryony					paralysis, bruises
Bugle					gastroinstenstinal disorders, hemorrhaging
Burdock				laxative, tuberculosis
Butterbur				fevers, urinary complaints
Cabbage Juice				ulcer, stomach treatment
Calotopis (mudar bark)		skin leprosy, elephantiasis
Camphor (gum camphor)		bruises, sprains, chills, fevers, cardiac stimulant
Caraway				antacid, aids digestion
Cardamom				bloodwarmer
Carrot juice and seeds			tonic for improved health, eyesight
Catnip					colds, fever, anti-spasmodic, hysteria
Cayenne				stimulant
Celery					liver functions, tonic stimulant
Chamomile				nervous conditions, ear aches, tooth aches
Chaulmoogra oil			fevers, sedatives, skin eruptions
Cherry gum				respiratory infections, food substitute
Chervil					?
Chives					colds, general disease, evil eye
Cinnamon				disinfectant, nausea, preservative
Cleavers (goosegrass)			fevers, circulation, blood purifier, wounds, livers
Clover					tonic
Cloves					anesthetic, circulation, germicide, disinfectant
Comfrey root (healing herb)		colds, respiratory conditions, wounds and fractures
Coriander				tonic
Coughgrass				bladder, urinary infections
Crawlbane				insect ward
Cucumber				inflammation
Cumin seed				stimulant
Dandelion				diuretic, purgative, tonic
Darkweed				Trueseeing
Deathmock				cataleptic trance
Digitalis (dead men bells, foxglove)	heart stimulant, tonic, kidney treatment
Dill					nausea
Ergot (rye smut)			hemorrhaging, venereal disease,
Eyebright				astringent, eye infections
Felamour (humanoid pipeweed)	sedative, narcotic, hallucinations
Fennel					digestion, weight control, muscle tone, reflexes
Fenugreek				Stimulant
Fiendflower				inflicts madness
Fig					demulcent
Figwort (scrofula plant, throatwort)	abscesses, wounds, pain killer
Fireweed				astringent, anti-spasmodic
Fluellin					astringent, tissue strengthener
Garden Burnet				?
Garlic					coughs, colds, blood purifier, detoxifier, vampires
Gelsemium (wild woodbine)		sedative, nerve tonic, fevers
Gentian (bitter wort, felwort)		tonic, fevers, anti-venom
Geranium (sweet geranium)		alkalizer
Ghostroot				repels undead
Ginger					stimulant, colds, cramps
Ginseng				glandular stimulant, vision, dizziness, weakness
Goat’s rue				diuretic, wormer (vermifuge)
Grape juice				blood fortifier
Graveolens				prevents diseases (lycanthropy), disinfectant
Hartstongue				cough, liver, spleen, bladder
Hawthorn				heart, arteries
Hedge mustard				throat, lungs
Hellebore				heart tonic (roots are poisonous)
honeysuckle				liver, spleen, respiratory disorders
Horehound, white			coughs, pulmonary disease, anti-venom
Horehound, black			stimulant, wormer, hemorrhaging
Horseradish				tonic, antiseptic, wormer
Hushthorn				powerful sedative
Hyssop					respiratory ailments, jaundice, blood purifier
Ipecac					dysentery, mouth infections
Irish moss				coughs, scalds, burns
Jambul seed				blood purifier, diabetes
Jewel weed (balsam weed )		diuretic, kidneys, skin growths, fungus, liver
Juniper berry				aphrodisiac, stimulant, disinfectant, VD
Jurubera				anemia
Kelp (seawrack)			thyroid, heart, arteries
Larkspur (Knight’s spur)		external parasites
Leeks					see chives
Lenthal					poison curative, intoxication preventative
Lily of the Valley			heart tonic
Lotus					?
Lucerne (alfalfa, hay)			strength
Lycopodium (fox tail, lamb’s tail)	wounds, lungs, kidneys,
Mace					stimulant
Marigold				fevers, varicosity’s, eyes, heart
Marjoram				melancholia, dizziness, brain disorders, toothaches
Masterwort				stimulates organs, anti-spasmodic
Mistletoe				convulsions, hysteria, narcotic
Muira-puama				aphrodisiac
Mustard				emetic, counter-irritant, colds, fevers
Nevermind (Stygus weed)		causes amnesia
Nutmeg				nausea, vomiting, diarrhea
Nux Vomica (poison nut)		stimulant, debility tonic
Onion					Poultices, colds (as chives)
Oregano				germicide, pain killer
Paprika				stimulant, poultice
Parsley					blood purifier
Parsnip					fevers
Peach Seeds				fevers, blood tonic
Pepper, black				sprains, neuritis
Peppermint				?
Pitcher plant				small pox preventative, cure, stomach, liver, kidneys
Plantain (ripple grass, way bread)	minor wounds, stings, rashes
Pomegranate				nerve sedative, wormer
Poppy					?
Pumpkin seed				virility, organ tonic
Quince					eye disease, dysentery, skin disorders
Radish					blood purifier, liver
Raspberry				fevers, tonic
Redoil					bruises, cuts, wounds,
Rhubarb				astringent, cathartic
Rose					colds, fevers
Rosemary				germicide, muscle tonic, evil spirit ward
Saffron					scarlet fever, measles, respiratory infection
Sage					tonic, wounds
Sarsaparilla (china root, spikenard)	system balance, blood purifier, venereal disease
Savitum (common pipeweed)		?
Scopolis				nerve and muscle sedative, pain killer, coughs
Scullcap (madweed)			nervous disorders, rabies
Senna					Purgative
Solniphia (pipeweed)			?
Spearmint				?
Strawberry				vision, swelling, inflammation
Summer Savory			vision, swelling, inflammation
Tamarind				blood purifier, palsy
Tansy					infection, gangrene
Tarragon				?
Tea					poison antidote
Thyme					antiseptic, blood purifier
Turmeric				?
Turnip					mouth disease, throat
Watercress				blood tonic (anemia)
White Bryony (Mandragora)		Carthartic, respiratory diseases, heart, kidneys

Information acquired from Dungeon Master Guide, Dragon Magazine, and the herbalism section in the Players Handbook (2nd printing)