RMRDBETK–. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Knackaway 823 III. THE KNACKAWAY GENUS EHRETIA PATRICK BROWNE Species Ebretia elliptica de CandoUe ALLED Anaqua by the Mexicans, this small tree, often a shrub, of rich valleys or sterile ridges of western Texas and northern Mexico, attains a maximum height of 15 meters, with a trunk diameter of i dm. The branches are stout, spreading, and ascending, the tree round topped. The bark is often 2.5 cm. thick, furrowed into pl