Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 1-64

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 65-96

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 97-112

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 137-164

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 165-172

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 173-187

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 219-247

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 249-254

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 255-262

Published in Annals of the Missouri Botanical Garden, in 1952, in volume 39, pages 289-348