ENGELMANN OAK (_Quercus engelmanni_) occupies a restricted range in southwestern California where it is generally spoken of as a desert tree; but its rate of growth appears to be much more rapid than is usual with trees in arid situations. It occupies a narrow belt in San Diego county and its range extends into Lower California. It forms about one-third of the stand in Palomar mountains, and is much scarcer in the Cuyamaca mountains. The tree seldom attains a height greater than forty or fifty feet, or a diameter more than twenty or thirty inches. The largest trees are of small value for lumber and in rare instances only, if at all, do they go to sawmills. The trunks fork and each branch forks, until a fairly large bole near the ground is divided among numerous limbs. The tree’s chief value is as fuel. It rates high as such. The leaves are bluish-green and are thick with sharp points on their margins. The leaves vary greatly in size, and are largest on young shoots. They remain a year on the tree, and are classed as evergreen. The acorns ripen in one year. This interesting species was named for Dr. George Engelmann, whose name is borne also by Engelmann spruce. The wood is among the heaviest of the oaks, exceeding white oak by more than twelve pounds per cubic foot. It is brittle and weak, and very dark brown. The green wood checks and warps badly in seasoning. The medullary rays are numerous and large, but are so irregularly dispersed that quarter-sawing promises no satisfactory results, even if logs of suitable size could be found. The annual rings are indistinct, owing to no clear line of separation between springwood and summerwood. Pores are numerous, diffuse, and some of them large. The species is entitled to recognition only because it is found in a region where forests are scarce and scrubby, and every trunk has value as fuel, if for nothing else. It affords a cover for hills which otherwise would be barren, and it frequently occurs in fairly dense thickets. [Illustration] PACIFIC POST OAK [Illustration: PACIFIC POST OAK] PACIFIC POST OAK (_Quercus Garryana_)