Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 31-61

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 63-82

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 83-92

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 93-95

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 97-136

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 137-140

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 141-147

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 149-164

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 171-193

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 195-205

Published in Contributions from the University of Michigan Herbarium, in 1993, in volume 19, pages 207-239

Published in Contributions from the University of Michigan Herbarium, in 1993, in volume 19, pages 241-257

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 259-263

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 271-291

Published in Contributions from the University of Michigan Herbarium, in 1993, in volume 19, pages 307-340

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 341-354

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 355-392

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 393-413

Published in Contributions From The University of Michigan Herbarium, in 1993, in volume 19, pages 415-429