Fig. 188: Eleocharis quadrangulata: a, habit, showing the rhizome, the basal leaf 

 sheaths, the tall 4-angled culms, and the cylindric spikelets, X I5; b, flower, showing 

 the rounded scale, the 3 stamens and the trifid style, X 6; c, mature achene, the 

 tubercle elongated and triangular, and the slender subtending bristles, X 8; d, culm, 

 showing the sharp angles (cross section), X 6; e, spikelet, X IVi. (From Mason, Fig. 

 144). 



