A large amount of folk-lore connected with plants has been collected by Drs. Fewkes and Hough. From the latter's extensive list I quote. For headache the leaves of the _Astragalus mollissimus_ are bruised and rubbed on the temples; tea is made from the root of the _Gaura parviflora_ for snake bite; women boil the _Townsendia arizonica_ into a tea and drink it to induce pregnancy; a plant called by the Hopi _wütakpala_ is rubbed on the breast or legs for pain; _Verbesina enceloides_ is used on boils or for skin diseases; _Croton texlusis_ is taken as an emetic; _Allionia linearis_ is boiled to make an infusion for wounds; the mistletoe that grows on the juniper (_Phoradendron juniperinum_) makes a beverage which both Hopi and Navaho say is like coffee, and a species that grows on the cottonwood, called _lo mapi_, is used as medicine; the leaves of _Gilia longiflora_ are boiled and drank for stomach ache; the leaves of the _Gilia multiflora_ (which is collected forty miles south of Walpi at an elevation of six thousand feet), when bruised and rubbed on ant bites is said to be a specific; _Oreocarya suffruticosa_ is pounded up and used for pains in the body; _Carduus rothrockii_ is boiled and drank as tea for colds which give rise to a prickling sensation in the throat; the leaves of _Coleosanthus wrightii_ are bruised and rubbed on the temples for headache, as also is the _Artemisia canadensis_; and so on throughout a list as long again as this. In connection with this list Dr. Hough calls attention to the workings of the Hopi mind in a manner which justifies an extensive quotation:-- "The word 'medicine' as applied by the Hopi and other tribes is very comprehensive, including charms to influence gods, men, and animals, or to cure a stomach ache. As stated, from experiments with the plants some have been discovered which are uniform in action and which would have place in a standard pharmacopœia. Thus there are heating plasters, powders for dressing wounds, emetics, diuretics, purges, sudorific infusions, etc. Other plants are of doubtful value, and in their use other animistic ideas may enter, though some of them, such as those infused for colds, headache, rheumatism, fever, etc., may have therapeutic properties. The obligation of the civilized to the uncivilized for healing plants is very great. Another class is clearly out of the domain of empirical medicine. Tea made from the thistle is a remedy for prickling pains in the larynx, milkweed will induce a flow of milk, and there are other examples of inferential medicine. Perhaps another class is shown by the employment of the plant named for the bat, in order to induce sleep in the daytime. "It may be interesting to look into the workings of the Indian mind as shown by his explanation of the uses of certain of these plants.