This region (see Fig. 1) in which the pecan is, or has been found, native, reaches its northern limit at Davenport, Iowa. It skirts the Wabash as far north as Terre Haute, Indiana, and along the Ohio river nearly to Cincinnati, Ohio. From thence its range extends south to Chattanooga, Tenn., and on to Vicksburg, Miss. From Vicksburg it skirts the Gulf of Mexico at a distance of seventy-five to one hundred miles to Laredo, Texas; thence along the Salado river into Mexico. The western boundary embraces the headwaters of the Colorado river and returns more or less directly to Davenport, Iowa. On the outskirts of this area, it extends farthest in all directions along the streams and rivers, while on the drier intervening ground the line does not extend so far from the center of the region. Particularly is this true in Southwestern Texas, where the pecan is confined almost solely to river bottoms. CULTURAL AREA. The area in which the pecan is cultivated as an orchard tree is not confined to the limits of its native range. Plantings have been made outside its native home in New Mexico, California and Oregon in the West, and in Virginia, North Carolina, South Carolina, Georgia, Florida, Southern Alabama and the Gulf regions of Louisiana, Mississippi and Texas. In many other States experimental plantings have been made. Leaving these out of consideration, however, it will be seen that in about twenty States the pecan is either found as a native tree in the forests or is cultivated in orchard form. The area corresponds in some measure with that in which cotton is grown, though it extends farther north and west than the cotton region. [Illustration: FIG. 1. Approximate Pecan areas. Native areas within solid line. Cultural area within dotted line.]