Published in Annals of the Missouri Botanical Garden, in 1955, in volume 42, pages 101-102
Published in Annals of the Missouri Botanical Garden, in 1955, in volume 42, pages 131-149
Published in Annals of the Missouri Botanical Garden, in 1955, in volume 42, pages 151-152
Published in Annals of the Missouri Botanical Garden, in 1955, in volume 42, pages 171-194
Published in Annals of the Missouri Botanical Garden, in 1955, in volume 42, pages 195-211
Published in Annals of the Missouri Botanical Garden, in 1955, in volume 42, pages 213-214
Published in Annals of the Missouri Botanical Garden, in 1955, in volume 42, pages 215-302