Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 245-272

Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 273-304

Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 305-319

Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 321-327

Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 329-356

Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 357-387

Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 389-411

Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 413-427

Published in Botanical Museum Leaflets, Harvard University, in 1959, in volume 18, pages 428-440