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1 Glumes < 0.6 mm long, appearing as triangular scales |
1 Glumes > 1.4 mm long. |
..2 Plants with rhizomes and stolons |
..2 Plants with stolons only. |
....3 Lemma margins glabrous |
....3 Lemma margins pubescent (at least sparsely). |
......4 First glume 2.0-2.3 mm long |
......4 First glume 1.7-2.0 mm long. |
........5 Spikes 4-9; culms to 6 dm tall |
........5 Spikes 6-13; culms to 12 dm tall |