THE TRIBES AND THEIR GENERA. 



45 



Mibora. Spike simple and slender. Glumes equal or nearly 

 so, erect, oblong, abrupt, keeled, awnless. Outer palea rather 

 shorter than glumes, very thin, 

 white, hairy. Inner palea absent 

 or little more than a tuft of 

 hair. Stamens three, filaments 

 capillary, twice as long as outer 

 palea. Ovary ovate; stigmas 

 long, slender, downy, with short 

 branches, protruding from apex 

 of spikelet. Grain elliptical, en- 

 closed in glumes but not united 

 to them. Leaves short and 

 setaceous. 



Species. M. verna, 22. 



Floret. 



Mibora verna. 

 For Spikelet see p. 113. 



Polypogon. Panicle spike -like. Glumes nearly equal, 

 narrow, straight, concave, bifid, with long slender awns. 



Outer palea about half as long 

 as glumes, thin, broadish, notched 

 at apex, awned. Inner palea notched 

 at apex, thin, transparent, narrow, 

 awnless. Lodicules oblong. Stamens 

 three ; filaments capillary, as long 

 as outer palea ; anthers oblong. 

 Ovary ovate ; styles two, wide 

 apart ; stigmas pectinately branched, 

 usually protruding from sides of 

 spikelets. Grain ovate, enveloped by 

 paleae. 



Polypogon littoraHs. 

 Floret. For Spikelet see p. 135. 



Species. P. monspeliensis, 24. 

 P. I it t oralis, 25. 



Agrostis. Panicle variable but more or less diffuse. Spike - 

 lets small. Outer glumes persistent, longer than paleae, equal, 

 narrow, pointed, awnless. Outer palea thin, membranous or 



