*Voss, E.G. & Reznicek, A.A. 2012. Field Manual of Michigan Flora. University of Michigan Press. Ann Arbor. ISBN 9780472118
Cobb, B., E. Farnsworth, and C. Lowe. 2005. Ferns of Northeastern
and Central North America. 2nd edition. [Peterson Field Guides].
Houghton Mifflin, Boston, MA. – the best up-to-date guide to ferns and
their relatives. ISBN 0618394960-0
Harris, J. G. and M. W. Harris. 1994. Plant
Identification Terminology. An Illustrated Glossary. Spring Lake
Publ. Spring Lake, Utah.
Barnes, B.V. and W.H. Wagner, Jr. 2003. Michigan Trees: A Guide
to the Trees of the Great Lakes Region. University of Michigan
Press - authoratative book on trees (and some shrubs) of this area
Barnes, B.V., C.W. Dick, and M.E. Gunn. 2016. Michigan Shrubs and Vines: A Guide to the Species of the Great Lakes Region. University of Michigan Press. Ann Arbor.
Petrides, G. A. 1986. Peterson Field Guides:
Trees and Shrubs. Houghton Mifflin Co. - superb guide to all woody
plants (trees, shrubs, vines) in NE and N Central USA and adjacent parts
of Canada.