The Luiseños had a great variety of food, though to a casual observer the district they inhabit appears to be, for the most part, of a semi-desert character, especially in the latter half of the year. The winter and spring rains cause numerous annual plants to grow, and many of these are used as greens, being either boiled or eaten fresh with salt. The seeds of many plants are also used, besides numerous fruits and berries. Seeds are always parched, this being effected by placing them in a broken piece of pottery, or a vessel made for that purpose, and toasting them over the fire, stirring them to prevent burning. Formerly they were often parched by being placed in a basket with live coals, and shaken until they were sufficiently cooked. After being parched, seeds are pounded into flour in a mortar. When required for use, this flour is mixed with water to form a mush, which is eaten cold. The staple food of the Luiseños, as of so many California Indians, was acorns. At least six species of oaks are found in Luiseño territory. The acorn considered by far the most palatable is that of the black or Kellogg's oak, Quercus Californica. This begins to be found at an elevation of about three thousand feet, and is abundant on Palomar. Next to the black oak the acorns of the common live oak, red oak, or field oak, Quercus agrifolia, are most esteemed. This tree is found from the coast to over three thousand feet above sea level. The acorns of this species contain more oil than those of the black oak, and the meal ground from them is of a yellow color. Quercus chrysolepsis, usually called the maul or Valparaiso oak, grows on Palomar in the canons at a somewhat lower elevation than the black oak. Its acorns, which are the largest and hardest of any of the oaks, are also considered to be palatable, though difficult to grind, and are gathered when those of the two species first mentioned fail. The acorns of the white oak, Quercus Engelmanni, the live oak, Quercus Wislizeni, and the scrub oak, Quercus dumosa, are