Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 33-41

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 63-72

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 73-78

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 79-111

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 113-183

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 183-209

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 211-225

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 227-258

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 259-270

Published in Annals of the Missouri Botanical Garden, in 1953, in volume 40, pages 271-401