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 77-91
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