Published in Botanical Museum Leaflets, Harvard University, in 1935, in volume 3, pages 77-91

Published in Botanical Museum Leaflets, Harvard University, in 1935, in volume 3, pages 61-76

Published in Botanical Museum Leaflets, Harvard University, in 1935, in volume 3, pages 93-110

Published in Botanical Museum Leaflets, Harvard University, in 1935, in volume 3, pages 113-133

Published in Botanical Museum Leaflets, Harvard University, in 1935, in volume 3, pages 136

Published in Botanical Museum Leaflets, Harvard University, in 1935, in volume 3, pages 137-148