VASCULAR PLANTS. 133 



SERIES H. MICRANTILE. 



Flowers inconspicuous. Inflorescence oo- 

 flowerecl. 



ORDER XXXV. GLUMACE^E. 



Flowers in the axils of bracts, and arranged 

 in spikelets. Spathes 0. Perigonium depau- 

 perate. Ovary 4-locular; 1 -seeded. Fruit a 

 caryopsis, with endosperm. 



Family XCIX. Graminese, 



Stem articulate. Leaves distichous, altenate, 

 sheathing, with ligule (stipule) at the base. 

 Flowers protected by an anterior and a poste- 

 rior bractlet, (palet). Spikelet generally pro- 

 tected by 1 — 2 bracts, (glumes). Stamens usu- 

 ally 3. Pistils 2. 



l- Panicum, L. 



Spikelets 2-flowered; upper one $ , with two 

 unequal, navicular glumes, without aristae; em- 

 braced by the incomplete lower one. 



0. H. leaves flattened. 



2. Phleum, L. 



Spikelets 1 -flowered, £. Glumes 2; aristate; 

 the upper palet sometimes bearing at its base 

 the rudiment of a second flower. 



0. 21. leaves flattened; panicles spike-like. 



