Published in Contributions From The University of Michigan Herbarium, in 1999, in volume 22, pages 1-19
Published in Contributions From The University of Michigan Herbarium, in 1999, in volume 22, pages 21-28
Published in Contributions From The University of Michigan Herbarium, in 1999, in volume 22, pages 29-31
Published in Contributions From The University of Michigan Herbarium, in 1999, in volume 22, pages 33-46
Published in Contributions From The University of Michigan Herbarium, in 1999, in volume 22, pages 47-93
Published in Contributions from the University of Michigan Herbarium, in 1999, in volume 22, pages 95-104
Published in Contributions From The University of Michigan Herbarium, in 1999, in volume 22, pages 105-119
Published in Contributions From The University of Michigan Herbarium, in 1999, in volume 22, pages 121-130
Published in Contributions From The University of Michigan Herbarium, in 1999, in volume 22, pages 131-134
Published in Contributions from the University of Michigan Herbarium, in 1999, in volume 22, pages 135-187