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1 Perennial, with scaly rhizomes; inflorescence either obviously paniculate, 7-25 cm long, with ascending to appressed branches, the main branches of the inflorescence apparent, the inflorescence outline thus appearing lobed, or densely spikelike, 1.5-15 cm long. | |
2 Glumes broadly winged; fertile lemmas ovate-lanceolate, densely pubescent; [section Bulbophalaris] | |
2 Glumes not winged; fertile lemmas narrowly lanceolate, glabrous to sparsely pubescent; [section Phalaroides] | |
1 Annual, without rhizomes; inflorescence densely spikelike or almost capitate, 1-9 cm long, the branches not apparent, the inflorescence outline a single ovoid, ellipsoid, or lanceolate form. | |
5 Sterile florets 2; [section Caroliniana]. | |