a variety ofc. Californica gravilis, while others make it a dis- tall and stout, attaining in its native country, we are told, to Atmospheric Dust. tinct species. It forms a small bushy tree, from 16 to 20 feet M. Vorlet d’Aoust says,in La Nature,that in Mexico de- from 30 to 35 feet in hight, and… … at the apex. It is particularly distinguished by theshape of its cones. These are of a dark brownish color, streaked with lighter lines, each of the four scales bearing, near its apex, a horn-like projection, nearly half an inch long, whence it de- rives its specific name, cornuta. These horns are…
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