The Hopi is quite a traveller. Though fond of home, I have met members of the tribe in varied quarters of the Painted Desert Region. They get a birch bark from the Verdi Valley with which they make the dye for their moccasins. A yellowish brown color, called _pavissa_, is obtained from a point near the junction of the Little Colorado and Marble Canyon. Here they obtain salt, and at the bottom of the salt springs, where the waters bubble up in pools, this _pavissa_ settles. Bahos, or prayer sticks, are always deposited at the time of obtaining this ochre, as it is to be used in the painting of the face of the bahos used in most sacred ceremonies. The so-called Moki trail is evidence of the long association between the Hopis and the Havasupais in Havasu (Cataract) Canyon, and I have often met them there trading blankets, horses, etc., for buckskin and the finely woven wicker bowl-baskets--kü-üs--of the Havasupais, which are much prized by the Hopis. Occasionally he reaches as far northeast as Lee's Ferry and even crosses into southern Utah, and at Zuni to the southeast he is ever a welcome visitor. The Apaches in the White Mountains tell that on occasions the Hopis will visit them, and when visiting the Yumas in 1902 they informed me that long ago the Snake Dancing Mokis were their friends, and sometimes came to see them. Dr. Walter Hough has written a most interesting paper on "Environmental Interrelations in Arizona," in which are many items about the Hopis. He says they brought from their priscan home corn, beans, melons, squash, cotton, and some garden plants, and that they have since acquired peaches, apricots, and wheat, and among other plants which they infrequently cultivate may be named onions, chili, sunflowers, sorghum, tomatoes, potatoes, grapes, pumpkins, garlic, coxcomb, coriander, saffron, tobacco, and nectarines. They are great beggars for seeds and will try any kind that may be given to them. Owing to their dependence upon wild grasses for food when their corn crops used to fail,--that is, in the days before a paternal government helped them out at such times,--every Hopi child was a trained botanist from his earliest years; not trained from our standpoint, but from theirs. We should say much of his knowledge was unscientific, and it goes far beyond the use of grasses and plants as food. Dr. Hough in his paper gives a number of examples of the uses to which the various seeds, etc., are put. The botanist as well as the ethnologist will find this a most comprehensive and useful list. For food forty-seven seeds, berries, stems, leaves, or roots are eaten. The seeds of a species of sporobolus are ground with corn to make a kind of cake, which the Hopis greatly enjoy. The leaves of a number are cooked and eaten as greens.