Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 25-29

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 31-32

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 33-37

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 39-40

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 41-71

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 73-84

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 97-99

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 101-102

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 105-111

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 112

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 2, pages 113-119

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 3, pages 1-16

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 3, pages 37-42

Published in Botanical Museum Leaflets, Harvard University, in 1934, in volume 3, pages 43-44