52 BULLETIN 1772, U. S. DEPARTMENT OF AGRICULTURE. 
Koryearpus Zea; Lag., Gen. and Sp. Nov. 4. 1816. The only species described 
is K. arundinaceus Zea, which is the same as Diarina festucoides. Lagasca cites 
ty the reference ‘Ac. Matr. 1806,” but 
y there seems to be no evidence that the 
\y j name Koryearpus was published earlier 
\V f than 1816. 
Ny Our single species, Diarina 
festucoides Raf. (fig. 20), is 
found in rich woods through 
the eastern United States. It is 
of little importance as a forage 
erass. 
i 7, 
Wy WY Y} p 
AY h wn L 
XQ} \ ry Af 
SN \p 
14. DISSANTHE- 
LIumM Trin. 
Spikelets 
mostly 2-flow- 
ered, the ra- 
chilla_ slender, 
disarticulating 
above the 
Fic, 19.—Molinia caerulea. Plant, X 4; spikelet and floret, xX 5. 
glumes and between the florets; glumes firm, nearly equal, acumi- 
nate, much longer than the lower floret, mostly exceeding all 
