At times, more especially in the seasons of active growth, some of the green and succulent portions of plants are eaten. This was very noticeable in the spring of 1919, when a most luxuriant growth of Mexican poppy (_Eschscholtzia mexicana_) occurred. Stomachs at this time were filled with the yellow and green mixture undoubtedly produced by the grinding up of the buds and flowers of this plant. Small caches of about a tablespoonful of these buds were also found in the burrows at this time. Occasionally in spring one may find a few green leaves of various plants, _Gaertneria_ very commonly, tucked away in small pockets along the underground tunnels, indicating that such materials are used to some extent. As has been shown in detail, however (Table 1), the chief storage, and undoubtedly the chief food, consists of air-dry seeds. The character of the storage, the absence of rain for months at a time in some years, and the consequent failure of green succulents show that without doubt _spectabilis_ possesses remarkable power, as to its water requirements, of existing largely if not wholly upon the water derived from air-dry starchy foods, i.e., metabolic water serves it in lieu of drink (Nelson, 1918, 400), this being formed in considerable quantities by oxidation of carbohydrates and fats (Babcock, 1912, 159, 170). During the long dry periods characteristic of southern Arizona, no evidence that the animal seeks a supply of succulent food, as cactus, is found; and if it may go for two, three, or six months without water or succulent food, it is reasonable to suppose that it may do so indefinitely. In the laboratory _spectabilis_ ordinarily does not drink, but rather shows a dislike for getting its nose wet. During the periods of drought the attacks upon the cactuses by other rodents of the same region, as _Lepus_, _Sylvilagus_, _Neotoma_, and _Ammospermophilus_, become increasingly evident. The list of plant species thus far found represented in the storage materials of _spectabilis_ on the Range Reserve is shown in Table 3. TABLE 3.--_List of all plant species found in 22 dens of _Dipodomys spectabilis_ on the United States Range Reserve, near the Santa Rita Mountains, Ariz., with approximate total weights._