Published in Botanical Museum Leaflets, Harvard University, in 1958, in volume 18, pages 103-108

Published in Botanical Museum Leaflets, Harvard University, in 1958, in volume 18, pages 109-112

Published in Botanical Museum Leaflets, Harvard University, in 1958, in volume 18, pages 113-180

Published in Botanical Museum Leaflets, Harvard University, in 1958, in volume 18, pages 181-185

Published in Botanical Museum Leaflets, Harvard University, in 1958, in volume 18, pages 219-228