VASCULAR PLANTS. 139 



Glumes 2, carinate, acute; the upper larger. 

 Palets 2 ; lower elougate, subulate ; upper 

 2-carinate. Ovary sessile; caryopsis free. 



2£. aquatic; leaves broad, flattened; panicles 

 diffused. 



22. Dactylis, L. 



Spikelets 1-sided, 2 — 7 -flowered. Glumes 2, 

 carinate, mucronately aristate. Palets 2; upper 

 2-carinate; lower 5-nerved, mucronately aristate; 

 carina ciliate. Ovary sessile; caryopsis free. 



It. leaves carinate; panicles glomerate, 

 1-sided. 



23. Koeleria, Pers. 



Spikelets 2 — 7-flowered; flowers distichous. 

 Glumes 2; carinate, awnless, unequal. Palets 

 2; lower enlarged; upper 2-carinate, 2-cleft. 

 Caryopsis terete free. 



0. leaves flattened ; panicles contracted, 

 spike-like; spikelets pedicillate. 



24. Melica, L. 



Spikelets 3 — 5-flowered; 2 inferior flowers £ , 

 the rest depauperate. Glumes 2, concave, awn- 

 less, unequal. Palets 2, sessile, smooth. Ca- 

 ryopsis terete free. 



2£. leaves flattened; spikelets pedicillate. 



25. Brizopyrum, Link. 



Dioecious. Spikelets compressed, co-flower- 



