xi] THE WATER PARSNIP 149 



linear segments ( in Fig. 97): secondly, compound-pinnate air 

 leaves, with each leaflet of the second degree toothed and lobed 



Fig. 97. Sium latifolium, L. Plant trom Roslyn Pits, May 30, 191 1, showing three 

 types of leaf: a, submerged compound-pinnate leaf with linear segments; b, erect 

 air-leaf, compound-pinnate; c and d, erect air leaves, simply-pinnate. (Reduced.) 



[A. A.] 



(b in Fig. 97); and thirdly, air leaves, once pinnate, with the 

 leaflets toothed but not lobed (c and d\n Fig. 97). Some small 

 plants were found bearing the submerged type of leaf alone. 



