Fig. 307: Heteranthera duhia: a, capsule, sessile in leaf axil and enclosed by spathe. 

 X \\->; b, mature seed, finely cross-striate and with membranous longitudinal ribs, X 

 12; c, habit, showing the ribbonlike leaves, sessile flowers and fruit and roots at the 

 nodes, X 7.-,; d, spathe with flower in leaf axil, X 2; e and f, leaf sheaths, showing the 

 stipulelike appendages, X 4. (From Mason, Fig. 168). 



