A GUIDE AND KEY TO AQUATIC PLANTS 



85 



4. Spikelets subtended by conspicuous white or 7. Dichromena, p. 94. 

 partly white bracts (fig. 3) . 



4. Spikelets not subtended by white bracts 5. 



5. Scales of the spikelet 2-ranked, often making the spike- 6. 



let appear flattened. 

 5. Scales of the spikelet spirally overlapping, not 2-ranked- 7. 



6. Stem round, hollow; spikelets borne in axil- 1. Dulichium, p. 87. 



lary as well as terminal clusters (fig. 4). 

 6. Stem3-angled,sometimesbluntly so; spikelets 2. Cyperus, p. 87. 

 borne in terminal clusters (fig. 5). 



Figure 3 



Figure 4 



Figure 5 



