3G3 
DOUHTFUL AND EXCLUDED STECIES. 
Panicum mertensii Eotli.; F.-Vi!l. Nov. App. (1883) 312. First credited 
to the Pliilippines by Llanos, Mein. Ac. Cienc. Mad. (1858), Imt certainly 
erroneously identified. An American species. 
Panicum gaudichaudii Kunth; F.-Vill. 1. c. 311. A species of the Marianne 
Islands. F.-Villar’s record for this species as a Philippine plant has never been 
verified, probably an erroneous identification on bis ] yAYt = Digi 1 aria stricia 
Gandich. 
Panicum leucopiiaeum H. B. K.; F.-Vill. I. c. 311. 
Presl (Bel. Haenk. 1 (1830) 299) states regarding this species “Hab. in 
(Mexico, in Luzonia” from wliich F.-Villar compiled his record for the Philippines. 
F.-Villar states, however, that he saw living specimens in Luzon and Panay, 
M'hich might have been Faiiicum viUvsum Lam. The species is Mexican, and 
some Australian forms have been referred to it. It is not to ho expected in 
the Philippines. 
Panicum helopus Trim; F.-Vill. 1. c. 311.= 7h seiU/ertim Betz., a species of 
British India, hardly to be expected in the Pliilippines. F.-Villar reduces to 
P. heJopus, Sctaria pUifera Llanos Frag. PI. Filip. (1851) 34, and while this 
reduction is apparently erroneous, I have been unable to determine Llanos’s species 
satisfactorily from his very imperfect description. 
Panicum elatius Kunth Bev. Gram. 1 (1829) 38; F.-Vill. Nov. App. (1883) 
‘il2.=Pcmicvm altissimum Mey., a species of tropical America. Certainly an 
erroneous identification on the part of F.-Villar. 
(30) ICHNANTHUS Beauv. 
Similar to Panicum, but tlie flowering glume pt>iticellate and with two 
basal appendages or scars. 
Species about 20, mostly tropical America, two in tropical Asia; one in the 
Philippiines. 
(1) I. pallens (Sw.) Munro in Benth FI. Hongk. (1801) 414; Hook. f. FI. 
Brit. Ind. 7 (1897) 00; Bendle in Forbes & llemsl. Journ. Linn. Soc. Bot. 3 6 
(1804) 334; Hack, in Govt. Lab. Publ. 35 (1905) 80. Panicum pallens Sw. 
Prodr. (1788) 23; Kunth Enum. 1 (1833) 89. P. niiens Merr. Govt. Lali. Publ. 
17 (1904) 8. 
Luzon, Province of Bataan, Mount Mariveles (3221, 3750 Merrill ) October, 
1903, January, 1904. 
Tropics of both hemispheres. 
(31) OPLISMENUS Beauv. 
Spikelets 1-flowered in small groups or clusters along the branches of 
the panicle, secund; first and second glumes always awned, the third 
frecjuently awned. 
Species about 0, tropical and subtropical regions of both hemispheres; three 
in the Philippines. 
1. Spikelets about 2 mm. long, greenish, cUosely imbricate, green ; 
awns capillary (1)0. Inirmaiuiii 
1. Spikelets 3 to 4 mm. long, loosely imbricate or scattered, often 
purplish ; awns stout. 
2. More or less pubescent ; spikes elongated (2)0. compositus 
2. Glabrous or nearly so ; spikes short or reduced to a single 
fascicle of flowers (3) O. unilulatifoli-us 
