Tradescantia

1. Pedicels and sepals glabrous or with a few hairs at base or apex of the latter.

T. ohiensis

1. Pedicels and sepals conspicuously pubescent throughout.

2. Pubescence largely of glandular-viscid hairs.

T. bracteata

2. Pubescence of glandless hairs.

T. virginiana

All species found in Tradescantia

Tradescantia bracteataLONG-BRACTED SPIDERWORT 
Tradescantia ohiensisCOMMON SPIDERWORT 
Tradescantia virginianaVIRGINIA SPIDERWORT 

Citation:

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