Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.


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.

P. macounii

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.

P. micradenium

2. Stems with white tomentum, concealing any glands.

P. obtusifolium

All species found in Pseudognaphalium

Pseudognaphalium macouniiCLAMMY CUDWEED 
Pseudognaphalium micradeniumCUDWEED 
Pseudognaphalium obtusifoliumFRAGRANT CUDWEED, OLD-FIELD BALSAM 


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 1, 2023.