Published in Annals of the Missouri Botanical Garden, in 1956, in volume 43, pages 1-85

Published in Annals of the Missouri Botanical Garden, in 1956, in volume 43, pages 87-188

Published in Annals of the Missouri Botanical Garden, in 1956, in volume 43, pages 253-354

Published in Annals of the Missouri Botanical Garden, in 1956, in volume 43, pages 355-378

Published in Annals of the Missouri Botanical Garden, in 1956, in volume 43, pages 379-380

Published in Annals of the Missouri Botanical Garden, in 1956, in volume 43, pages 381-396