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