Salsola

1. Bracts appressed, at most the tips arching outwards, strongly imbricate at maturity; spikes rather dense, not interrupted at maturity; perianth segments wingless or with a narrow erose wing.

S. collina

1. Bracts spreading to reflexed from the base, not imbricate at maturity; spikes at maturity interrupted at least in proximal 1/2; perianth segments usually with membranous wing.

S. tragus

All species found in Salsola

Salsola collinaSLENDER RUSSIAN THISTLE 
Salsola tragusRUSSIAN-THISTLE 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 25, 2017. http://michiganflora.net/genus.aspx?id=Salsola.