Tamarix

1.  Sepals, petals, and stamens 4; flowers borne on the wood of previous years (and opening in spring).

T. parviflora

1. Sepals, petals, and stamens 5; flowers borne apically on new shoots (and opening in summer).

T. ramossissima

All species found in Tamarix

Tamarix parvifloraTAMARISK, SALT-CEDAR 
Tamarix ramossissimaSALT-CEDAR 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 7, 2020. https://michiganflora.net/genus.aspx?id=Tamarix.