Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 113-130

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 91-97

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 3-38

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 39-41

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 107-111

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 141-147

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 99-103

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 73-86

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 87-90

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 131-140

Published in Contributions From The University of Michigan Herbarium, in 1992, in volume 18, pages 43-71