xxxu 
SYNOPSIS OF THE NATCRAL OEDEES. 
Flowers on a thick spadix in a spath. Perianth none. 
Anthers ovate ; filaments very short. 
xcii. Araceee (Ajese). 
77 Flowers capitate. Stamens 2 — 5. 
Ixxxviii. JEriocaidacea. 
Flowers 2 in a spath, one male, one female. (Floating.) 
xciii. Lemnacece. 
Flowers in two rows on one side of a spath, inclosed by 
a fold of the leaf ■ . . xcv. Naiadaceee. 
78 Leaves with entire sheaths. Anthers entire at the 
ends xcvi. Cypcrdcece. 
Leaves with split sheaths. Anthers notched at both ends. 
xcvii. Graminece, 
