Published in Annals of the Missouri Botanical Garden, in 1920, in volume 7, pages 1-49

Published in Annals of the Missouri Botanical Garden, in 1920, in volume 7, pages 51-74

Published in Annals of the Missouri Botanical Garden, in 1920, in volume 7, pages 81-249

Published in Annals of the Missouri Botanical Garden, in 1920, in volume 7, pages 249-289

Published in Annals of the Missouri Botanical Garden, in 1920, in volume 7, pages 299-305