£e Se cuneata Sheld. 7 —>Petioles 20-30 cm. long or in submerged 
plants much longer; leaf-blades 5-15 cm. long, not greatly variable in 
proportion, the middle lobe 1.5-6 cm. broad, mostly obtuse, especially in 
terrestrial forms, the reflexed ] acute, for the most pa especially 
in floating leaves, aCkwe arkedly curving; 
flowering scapes 30-40 u 
lanceolate, 8-20 mm. long; Sepals concave, greenish, ovate 5-8 mn. long; 
petals white rotund, 10-15 mm. long; anthers 1.5 mm. long; styles .3-.5 mm. 
long; fruiting heads globose, 8-12 mm. broad; achenes scarcely 2 mm. long, ‘ 
bovate-cuneate, truncate at a beari t ra r 
beak .5-.5 mme long, winged, the wing subequal to the body of the achene. : 
—> (S. arifolia Nutt.). 
In marshes and in shallow water along slowly moving streams. 
merged plants, the bracts ovate = 
~ eet wie et 
Sm eT etl et le iy nes + * 
