Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 1-8

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 9-90

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 91-108

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 109-112

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 113-168

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 169-240

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 333-334

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 335-340

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 341-378

Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 379-434