Castanea

1. Outer bud scales and undersides of the leaves glabrous or nearly so; spines on involucres surrounding nuts glabrous.

C. dentata

1. Buds and undersides of the leaves ± densely pubescent; spines on involucres surrounding nuts pubescent.

C. mollissima

All species found in Castanea

Castanea dentataAMERICAN CHESTNUT 
Castanea mollissimaCHINESE CHESTNUT 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. April 26, 2017. http://michiganflora.net/genus.aspx?id=Castanea.