All our species have glandular foliage and a prominent sweet balsamic odor.
1. Leaves decurrent (stem with 2 short wings of leaf tissue extending beneath each node); stems (at least on the less tomentose middle and lower internodes) with evident spreading glandular hairs all or mostly 0.3–0.7 mm long.
1. Leaves not decurrent; stems with glandular hairs, if any, at most ca. 0.2 mm long, usually not evident.
2. Stems green, with evident but tiny (ca. 0.2 mm or less) gland-tipped hairs.
2. Stems with white tomentum, concealing any glands.
All species found in Pseudognaphalium
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 28, 2017. http://michiganflora.net/genus.aspx?id=Pseudognaphalium.