Pinus cembroides var. Parryana Voss. Nut Pine. Piñon. _Pinus quadrifolia_ Sudw. [Illustration: Fig. 9] Leaves in 1—5 usually 4-leaved clusters, stout, incurved, pale glaucous green, marked on the three surfaces by numerous rows of stomata, 1¼′—1½′ long, irregularly deciduous, mostly falling in their third year. A tree, 30°—40° high, with a short trunk occasionally 18′ in diameter, and thick spreading branches forming a compact regularpyramidal or in old age a low round-topped irregular head, and stout branchlets coated at first with soft pubescence, and light orange-brown. Bark ½′—¾′ thick, dark brown tinged with red, and divided by shallow fissures into broad flat connected ridges covered by thick closely appressed plate-like scales. Wood light, soft, close-grained, pale brown or yellow. The seeds form an important article of food for the Indians of Lower California. Distribution. Arid mesas and low mountain slopes of Lower California southward to the foothills of the San Pedro Mártir Mountains, extending northward across the boundary of California to the desert slopes of the Santa Rosa Mountains, Riverside County, where it is common at elevations of 5000° above the sea-level. Pinus cembroides var. edulis Voss. Nut Pine. Piñon. _Pinus edulis_ Engelm. [Illustration: Fig. 10] Leaves in 2 or rarely in 3-leaved clusters, stout, semiterete or triangular, rigid, incurved, dark-green, marked by numerous rows of stomata, ¾′—1½′ long, deciduous during the third or not until the fourth or fifth year, dropping irregularly and sometimes persistent for eight or nine years. A tree often 40°—50° high with a tall trunk occasionally 2° in diameter and short erect branches forming a narrow head, or frequently with a short divided trunk and a low round-topped head of spreading branches, and thick branchlets orange color during their first and second years, finally becoming light gray or dark brown sometimes tinged with red. Bark ½′—¾′ thick and irregularly divided into connected ridges covered by small closely appressed light brown scales tinged with red or orange color. Wood light, soft, not strong, brittle, pale brown; largely employed for fuel and fencing, and as charcoal used in smelting; in western Texas occasionally sawed into lumber. The seeds form an important article of food among Indians and Mexicans, and are sold in the markets of Colorado and New Mexico.