Allspice, Angelica*, Anise, Arnica*, Bayberry, Birthwort*, Black Pepper, Blessed Thistle, Bloodroot*, Boneset (powerful), Buchu, Camomile (Roman), Caraway, Cardamon, Carrot, Cayenne*, Celery, Chervil, Cloves, Cubeb, Dogbane*, Dogwood*, Dyer's Broom,*, Elder Flowers*, Elecampane, Ephedra*, Eucalyptus, European Vervain, False Unicorn, Fennel, Feverfew, Fo-ti, Garlic, Ginger, Ginseng, Goldenrod, Ground Ivy*, Guaiac, Hedge Garlic*, Holly*, Horehound, Horseradish*(powerful), Hyssop*, Imperial Masterwort, Juniper Berries*, Khus-Khus, Kola Tree, Lavender, Lovage*, Magnolia, Masterwort*, Matico, Mexican Damiana, Mezereon*, Mistletoe*, Monarda, Nutmeg*, Oat, Onion, Orange (citrus aurantium), Pennyroyal*, Peppermint, Pitcher Plant, Poplar (Poplus cadicans), Prickly Ash, Ragged Cup, Raspberry, Red Pimpernel*, Rosemary*, Rue*, Sandalwood, Sassafras, Savory, Senega Snakeroot*, Shepherd's Purse, Spearmint, Spikenard, Star Anise*, Turtlebloom, Virginia Snakeroot*, Virgin's Bower*, Watercress*, Water Eryngo, Wild Hyssop, Wintergreen*, Wormwood*, Yarrow.

 Angelica - (a) Angelica archangelica (b)Angelica sylvestris - CAUTION: (a) This herb is generally considered safe, but large doses can have an untoward effect on blood pressure, heart action, and respiration. (b) Wild angelica can be confused very easily with European water hemlock, and this herb is poisonous. Care should be taken when identifying this herb.

 Arnica - See Diuretics

 Birthwort - See Oxytocics

 Bloodroot - See Antipyretics

 Cayenne - See Anticatarrhals

 Dogbane - See Cathartics

 Dogwood - Cornus florida - CAUTION: Use only bark that has been dried.

 Dyer's Broom - See Aperients

 Elder Flowers - See Antipyretics

 Ephedra - See Antiasthmatics

 Ground Ivy - See Antilithics

 Hedge Garlic - See Anthelmintics

 Holly - See Alteratives

 Hyssop - Hyssopus officinalis - CAUTION: Continuous use for extended periods of time is not recommended.

 Juniper Berries - See Analgesics

 Lovage - Levisticum officinale - CAUTION: Lovage is mainly used for its diuretic properties, but excessive doses can cause kidney damage, and should not be used by those with kidney problems. It also promotes the onset of menstruation and should not be used by pregnant women.

 Masterwort - Heracleum lanatum - CAUTION: Dermatitis can be acquired by contact with the fresh foliage . Cattle have been reported poisoned by eating the fresh foliage.

 Mezereon - See Rubefacients

 Mistletoe - See Abortifacients

 Nutmeg - Myristica fragrans - CAUTION: Eating as little as two nutmegs can cause death.

 Pennyroyal - See Abortifacients

 Red Pimpernel - See Nervines

 Rosemary - See Antibiotics

 Rue - See Parasitecides

 Senega Snakeroot - See Sialagogues

 Star Anise - Illicium anisatum or Illicium verum -CAUTION: Commercial Star Anise may be adulterated with a poisonous seed of another plant. They are slightly smaller and darker and have a sharp and bitter odor, resembling cardamom rather than anise.

 Virginia Snakeroot - Aristolochia serpentaria - CAUTION: An alkaloid which can paralyze the respiratory system is contained in Virginia snakeroot. Use only very small amounts of this herb.

 Virgin's Bower - Clematis virginiana - CAUTION: Severe skin irritation can be caused by the acrid substances contained in Virgin's Bower. Dermatitis is easily contracted from the handling of this plant.

 Watercress - See Diuretics

 Wintergreen - Gaultheria procumbens - CAUTION: Pure oil of Wintergreen can cause irritation and should be used cautiously.

 Wormwood - See Anthelmintics

*(Herbs in which a Caution exists. For those without a description of that Caution on this page, a link is provided.)