The stems are contracted with an incurvate and thinned basal edge.
The base is incurvate and usually thinned with some fine retouch.
The stem may be straight or slightly expanded with straight or incurvate side edges.
The blade is usually straight; rarely, excurvate or incurvate.
The basal edge may be straight—or incurvate one or two millimeters—and is thinned.
The side edges of the stem are incurvate and the base is usually straight.
The stem is usually straight but may be expanded, with straight or incurvate side edges.
The basal edge is usually thinned and incurvate, but may be straight.
The side edges of the stem are incurvate and usually ground.
The blade is incurvate, beveled on each side of both faces, and is in rare instances serrated.