Elaeagnus

1. Leaves and branchlets with only silvery scales; expanded floral tube (i.e., beyond the constriction around the ovary) less than twice as long as the lobes; fruiting pedicels not conspicuously expanded distally, clearly shorter than the fruit.

E. angustifolia

1. Leaves and branchlets, at least when young, with some scattered rust-brown scales; expanded floral tube at least twice as long as the lobes; fruiting pedicels conspicuously expanded distally, about as long as to clearly longer than the fruit.

E. umbellata

All species found in Elaeagnus

Elaeagnus angustifoliaRUSSIAN-OLIVE 
Elaeagnus umbellataAUTUMN-OLIVE 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 22, 2017. http://michiganflora.net/genus.aspx?id=Elaeagnus.