Berniee P. Bishoj) Musi'Uiii. 



Oecnsioiuil Tapers Vol. VII, Tlate XIII. 



MAllSILEA VILI.OSA KAULF. Sterile specimens showing varia 

 tion ill length of petioles in proportion to the depth of the water in 

 which they grew — the longest petioles from the deepest water. The cen- 

 tral specimen grew with grass in water. No. 2362 B. P. B. M. Her- 

 barium. 



