Ferula (asafetida): Middle and western Asia.
Order XXIX.—Rubiaceæ: Trees, shrubs, herbs; three hundred and thirty-seven genera, including madder, coffee, tea, etc., according to most authorities.
Cephaelis (ipecacuanha): Shrub. Tropical and sub-tropical. Bolivia, Colombia. Cultivated in West Indies, Hindustan, India, America.
Cinchona (Peruvian bark): Trees. Tropical Andes. Cultivated in Ceylon, Jamaica.
Coffea (coffee): Shrub. Persia. Cultivated in Arabia, East Indies, Mexico, Brazil, Guatemala, Cuba, British West Indies, Santo Domingo, Java, Padang, Sumatra, Macassar, Ceylon, British India, Manila.
Rubia (madder): Perennial. West Asia, Mediterranean countries.
Order XXXVII.—Borraginaceæ: Herbs; sixty-eight genera.
Symphytum (comfrey): Perennial herb. Peloponnesus and Greek islands. Cultivated in middle Europe and older parts of the United States.
Order XXXVIII.—Convolvulaceæ: Herb; thirty-two genera.
Ipomoea (sweet potato): Perennial. Asia and America. Cultivated in southern United States, Carolinas, Virginia, Maryland, Delaware, southern New Jersey, southern Spain, Italy.