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