Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 113-119

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 121-124

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 125-161

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 179-250

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 261-267

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 308-357

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 391-408

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 419

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 420-438

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 444-464

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 465-467

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 471-475

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, pages 475-476

Published in Annals of the Missouri Botanical Garden, in 1969, in volume 56, issue 3, pages 439-443