Intelka 1943 June 15 2 mile Hayfork, 2400 ft., Trinity Co., Calif. Douglas fir on higher slopes. The basin itself is oval shaped, longest in an approximate E-W direction, perhaps about 6 miles x 3 miles. Roaching and placer-mining activities have resulted in considerable disturbance to the floor of the basin and its immediate border along the slope bases, but such remnants of forest as are present, chiefly along the periphery of the basin, seem to indicate a forest climate primarily yellow pine and deerwood oak. Along certain exposed low ridges on the north side of the basin, sugar pines are the more abundant species of conifer. No oaks other than the black and gray oaks were noted. Probably prior to disturbance, there were meadows along Hayfork Creek, and possibly patches of upland grassland on certain low ridges in the western part of the basin, where we observed areas of grassland with scattered oaks at the latter site. The general situation here appears to be more rare than anywhere else in the basin, and the local grassland may be representative of an earlier similar vegetation. Certain portions of the flats to either side