Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 95-102

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 103-137

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 138-146

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 147-152

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 153-171

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 172-177

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 178-181

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 184

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 186-188

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 191

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 192

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 193-194

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 194-198

Published in Annals of the Missouri Botanical Garden, in 1967, in volume 54, pages 200