Published in Annals of the Missouri Botanical Garden, in 1961, in volume 48, pages 1-106

Published in Annals of the Missouri Botanical Garden, in 1961, in volume 48, pages 107-124

Published in Annals of the Missouri Botanical Garden, in 1961, in volume 48, pages 133-136

Published in Annals of the Missouri Botanical Garden, in 1961, in volume 48, pages 137-172

Published in Annals of the Missouri Botanical Garden, in 1961, in volume 48, pages 269-274

Published in Annals of the Missouri Botanical Garden, in 1961, in volume 48, pages 291-327