Amaranthus

Comparison Chart for Species of Amaranthus

Character

seed outline, seed thickness, marginal rim, hilar notch protrusion

round to elliptic
0.6–0.9 mm thick
rim obtuse
notch barely protruding

round, elliptic, obovate
0.7–1 mm thick
rim acute
notch barely protruding

round to obovate
0.2–0.4 mm thick
rim obtuse
notch protruding

round to elliptic
(0.6)0.8–1 mm thick
rim acute
notch protruding

Character

seed outline, seed thickness, marginal rim, hilar notch protrusion

round to elliptic
0.4–0.6 mm thick
rim obtuse
notch protruding

elliptic to obovate
0.4–0.6 mm thick
rim obtuse to acute
notch barely protruding

elliptic to obovate
0.5–0.7 mm thick
rim obtuse
notch protruding

elliptic to obovate
0.6–1 mm thick
rim obtuse
notch protruding

*Note: It may not be possible to distinguish these species based on the seed alone.