GRAMINEAE 67 
in the Philippines at low altitudes, but is of local occurrence. It 
always grows along the margins of streams and lakes, or some- 
times in shallow water. Lilanos’s species was erroneously re- 
duced by Fernandez-Villar to Panicum miliiforme Pres] which 
is apparently a synonym of P. distachyum Linn. At any rate 
the plant Llanos described is entirely different from Presl’s 
species. 
Illustrative specimen from Bosoboso, Rizal Province, Luzon, 
September, 1915 (Merrill: Species Blancoanae No. 967). 
Panicum tuberosum Llanos Frag. Pl. Filip. ( 1851) 40 (sp. nov.); F.-Vill. 
& Naves in Blanco FI. Filip. ed. 3, 4? (1880) 29=PANICUM REPENS 
Linn. 
Panicum tuberosum Llanos does not appear in Index Kewensis. 
It was reduced by Fernandez-Villar to Panicum ischaemoides 
Retz., which is generally. considered to be a synonym of Panicum 
repens Linn. The description manifestly applies to Panicum 
repens Linn., which agrees with Llanos’s statements as to habitat 
and as to root characters. It is still known in Calumpit as luya+ 
luya, on account of the resemblance of its fresh rhizomes to those 
of ginger. It is common and widely distributed in the Philip- 
pines at low altitudes, especially near the sea. . 
Illustrative specimen (a topotype of Panicum tuberosum) 
from Calumpit, Bulacan Province, Luzon, January, 1915, there 
known as luya-luya (Merrill: Species Blancoanae No. 708). 
OPLISMENUS Beauvois ; 
Orthopogon setarius ? Llanos Frag. Pl. Filip. (1851) 35; F.-Vill. & Naves 
in Blanco Fl. Filip. ed. 3, 4* (1880) 25, non Spreng.=OPLISMENUS 
COMPOSITUS (L.) Beauv. 
Orthopogon hirtellus R. Br.; Llanos Frag. Pl. Filip. (1851) 37; F.-Vill. & 
Naves in Blanco Fl. Filip. ed. 3, 4* (1880 26—=OPLISMENUS COM- 
POSITUS (L.) Beauv. 5 
F.-Villar reduced Orthopogon setarius Llanos to Oplismenus 
burmannii Beauv., but the description applies rather better to 
the much commoner O. compositus Beauv., where I think 
it should be placed. Llanos was correct in his interpretation 
of Orthopogon hirtellus R. Br., which is, however, a synonym of 
Oplismenus compositus Beauv. It was reduced by Fernandez- 
Villar to Paniewm lanceolatum Retz., which is also a synonym of 
Oplismenus compositus Beauv. It is common and widely dis- 
tributed in the Philippines at low and medium altitudes. ’ 
Illustrative specimen from Manila, Luzon, November, 1914 
(Merrill: Species Blancoanae No. 204). 
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