GENERA OF GRASSES OF THE UNITED STATES. 
205 
side of the branchlets. Species ten, tropical and temperate regions ; 
five species in the United States, mostly swamp grasses. 
Type species: Phalaris oryzoides L. 
Homalocenchrus Mieg, Act. Helv. 
Phys. Math. 4: 307. 1760. One spe- 
cies is referred to the genus with cer- 
tainty, another being doubtfully re- 
IV rred to it. No specific names are 
used, but under the first there are two 
citations which appear in the Species 
Plantarum under Phalaris oryzoides. 
Leersia Swartz, Prod. Veg. Ind. Occ. 
21. 1788. Three species are de- 
scribed, L. monandra, L. hexandra, 
and L. oryzoides. Phalaris oryzoides 
Fig. 122.— Rice, Oryza sativa. Plant, X 
spikelot, X 5. 
P., the basis of the third species, is selected as the type, as this is the oldesl 
historically. 
