Species in this genus have both bisexual and staminate unisexual flowers. The distribution of these types of flowers within the inflorescence is important for identification. All species in New England have umbellets with both types of flowers, but some species also have umbellets with only staminate flowers. Reference: Pryer and Phillippe (1989).
This Genus’s Species in New England:
Visit this genus in the Dichotomous Key