Published in Bulletin of the Torrey Botanical Club, in 1901, in volume 28, pages 184-188

Published in Bulletin of the Torrey Botanical Club, in 1901, in volume 28, pages 421-444

Published in Bulletin of the Torrey Botanical Club, in 1901, in volume 28, pages 661-666

Published in Bulletin of the Torrey Botanical Club, in 1901, in volume 28, issue 2, pages 109-111