Distribution of Balsam Fir (Abies balsamea (L.) Miller),
a species rare in Iowa, but common in adjacent states

© Iowa Academy of Science. From Pusateri, W. P., D. M. Roosa & D. R. Farrar. 1993. Habitat and distribution of plants special to Iowa's Driftless Area, p. 43. J. Iowa Acad. Sci. 100: 29-53.