This is a medium to large ovoid point with a flattened to elliptical or diamond cross section.  The blade is excurvate with the widest portion of the blade commonly being below the midpoint.  Some examples have parallel sides.  Serrating may be present.  The blade is generally straight at the hafting region.  The base may vary from convex to having a pointed base.  The hafting area is commonly ground 10 to 30 mm from base.  However, some examples lack any hafting region grinding.  The flaking pattern may vary from parallel or oblique transverse in early examples to random flaking.  This point is made with broad percussion flaking finished with finer pressure flaking along the edges.

Size Measurements:  Total Length - 40 to 104 mm (65 to 75 mm average), Width - 15 to 33 mm (21 to 24 mm average),  Thickness - 7 to 14 mm. 

This point is most commonly found from northern Mexico into Texas, the Mississippi River Valley and into the Ohio River Valley and Tennessee River Valley (red).  This point has infrequently been reported into the yellow section.  Lerma points have been reported in the Tehuacacan Valley, Iztapan mammoth in the Federal Districk of Mexico, at San Nicolas rock shelter in Queretaro,  and associated witht he Lerma Culture of Tamaulipas.  Lerma points have been reported in Venezuela, Ecuador, Peru, and Chile.