Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 185-191

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 5, pages 89-99

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 5, pages 104

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 5, pages 143

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 5, pages 144

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 5, pages 145-160

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 5, pages 171-172

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 193-195

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 196-199

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 23-27

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 34-35

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 37-45

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 62-64

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 65-69

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 70-73

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 75-76

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 77-95

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 113-136

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 137-141

Published in Botanical Museum Leaflets, Harvard University, in 1938, in volume 6, pages 142-144