Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 1-34
Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 35-70
Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 71-100
Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 101-140
Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 141-172
Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 355-390
Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 391-424
Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 425-484