Published in Annals of the Missouri Botanical Garden, in 1962, in volume 49, pages 1-34

Published in Annals of the Missouri Botanical Garden, in 1962, in volume 49, pages 35-56

Published in Annals of the Missouri Botanical Garden, in 1962, in volume 49, pages 95-129

Published in Annals of the Missouri Botanical Garden, in 1962, in volume 49, pages 137-255