| 1. Glume generally = or > rest of spikelet except awns, lower lemmas hard, ± swollen at base |
| L. temulentum |
| 1' Glume < rest of spikelet, lower lemmas firmly membranous, flat to rounded at base |
| |
| 2. Lemmas awned, plants without sterile shoots at base |
| L. multiflorum |
| 2' Lemmas awnless, plants with sterile shoots at base |
| L. perenne
|