Ilex - 25 items, including China Reconstructs 1977 "Treating Burns with Herbal Medicine," Nature Magazine 1942 "The Shrub Called Paraguay."

Iboga - 3 items.

Illipe - 3 items.

Impatiens - 2 items.

Incense - 6 items.

Indigo - 5 items.

Ink - 4 items, including The Literary Digest 1917 "Indelible Ink from Fungi."

Insecticides 1 - 27 items, including The New York Times 1979 "An African Plant May Save Crops," The New York Times 1981 "Soap and Vinegar Are Fine Insecticides," The Times (London) 1980 "Zoology: Red Dye Deters Ants."

Insecticides 2 - 38 items, including The Herb Shelf 1983 "Insect Repellents for Pets & People," The New York Times 1982 "Plants That Kill Ticks," The New York Herald Tribune 1940 "The Weed That Is Winning a War," The New York Times 1970 "How to Turn Insects Against Themselves."

Insects - 48 items, including The New York Times 1981 "Bees Remember the Sun," Scientific American 1926 "The Scourge of the Japanese Beetle," Newsweek 1975 "Army Ants on the March," The New York Times 1981 "Massive Beetle Infestation Destroys Pines in West," Natural History 1979 "The Weevil and the Wasp."

Iodine - 5 items.

International Health -Volume 4, No. 2 April 1983.

Inula - 1 item.

Ipomoea - 6 items.

Iris - 2 items.

Irrigation - 7 items, including The New York Times 1981 "Ancients Had Water Politics, Too."

Isatis - 2 items.

Intoxicants - 22 items, including The Boston Globe 1972 "Scotch is Much Like a Symphony."

Ivy - 3 items.