Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 7-19

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 21-37

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 39-54

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 55-69

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 71-81

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 83-91

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 93-97

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 99-131

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 133-137

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 139-162

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 163-171

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 173-182

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 215-222

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 223-265

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 267-278

Published in Contributions From The University of Michigan Herbarium, in 1990, in volume 17, pages 279-293

Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 295-306

Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 307-312

Published in Contributions from the University of Michigan Herbarium, in 1990, in volume 17, pages 313-325