GENERA OF GRASSES OF THE UNITED STATES. 51 
13. DIARINA Raf. 
Spikelets few-flowered, the rachilla disarticulating abeve the 
glumes and between the florets; glumes unequal, acute, shorter than 
the lemmas, the first 1-nerved, the 
second 3 to 5 nerved; lemmas char- 
taceous, pointed, 3-nerved, the 
nerves converging in the point, the 
upper floret reduced; palea char- 
taceous, 2-nerved, obtuse, at ma- 
turity the lemma and palea widely 
spread by the large turgid beaked 
caryopsis with hard shining peri- 
carp. 
Perennials, with slender rhi- 
zomes, broadly linear, flat blades, 
long-tapering below, and narrow, 
few-flowered panicles. Species 
two, one in eastern Asia and one 
in the eastern United States. 
Type species : Festuca diandra Michx. 
Diarina Raf., Med. Repos. 5: 352. 
1808. Rafinesque bases a new genus on 
Vic. 15.--Catabrosa aquatica. Plant, K 43 spikelet and floret, «* 5. 
Festuca diandra Michx. (not Moench, 1794). He renames the species D. festu- 
coides. Beauvois’ spells the name Diarrhena, crediting it to “Shmal” | Rafin- 
esque-Schinalz| and renames the single species D. wmericana. 
1 Ess. Agrost. 142, pl. 25, f.1, 1812, 
