....3 Plants mostly monoecious (with male and female flowers in separate inflorescences on the same plant, usually with basal and apical inflorescences female and median inflorescences male), rarely an entire plant male or female; stems upright, erect, less branched; stems glabrous to puberulent or strigose, lacking (or nearly so) stinging hairs; leaf blades glabrous or glabrescent above (lacking stinging hairs), glabrous to puberulent below (with some stinging hairs); leaf teeth commonly 2-3.5 mm long