Published in Annals of the Missouri Botanical Garden, in 1959, in volume 46, pages 1-17

Published in Annals of the Missouri Botanical Garden, in 1959, in volume 46, pages 19-37

Published in Annals of the Missouri Botanical Garden, in 1959, in volume 46, pages 39-193

Published in Annals of the Missouri Botanical Garden, in 1959, in volume 46, pages 195-256

Published in Annals of the Missouri Botanical Garden, in 1959, in volume 46, pages 257-358