363 



DOUBTFUL AND EXCLUDED SPECIES. 



Panicum mertensii Roth.; F.-Vill. Nov. App. (188.S) 312. First credited 

 to the Pliilippines by Llanos, Mem. Ac. Cienc. Mad. (1858), but 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 phint has never been 

 verified, probably an erroneous identification on his ^avt=^Digitaria stricta 

 Gaudich. 



Panicum leucophaeum H. B. K.; F.-Vill. 1. c. 311. 



Presl (Rel. Haenk. 1 (1830) 299) states regarding this species "Hab. in 

 Mexico, in Liizonia" from which F.-Villar compiled his record for the Philippines. 

 F.-Villar states, however, that he saw living specimens in Luzon and Panay, 

 which might have been Panicum riUosiim Lam. The species is Mexican, and 

 some Australian forms have been referred to it. It is not to be expected in 

 the Philippines. 



Panicum helopus Trin. ; F.-Vill. 1. c. 311.=P. setigerum Retz., a species of 

 British India, hardly to be expected in the Philippines. F.-Villar reduces to 

 P. helopus, Setaria pUifera Llanos Frag. PI. Filip. (I85I) 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 Rev. Gram. T (1829) 38; F.-Vill. Nov. App. (1883) 

 2\2.=Pcmicum 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 pedicellate and with two 

 basal appendages or scars. 



Species about 20, mostly tropical America, two in tropical Asia ; one in the 

 Philippines. 



(1) I. pallens (Sw.) Munro in Benth Fl. Hongk. (1861) 414; Hook. f. Fl. 

 Brit. Ind. 7 (1897) 00; Rendle in Forbes & Hemsl. Journ. Linn. Soc. Bot. 36 

 (1804) 334; Hack, in Govt. Lab. Publ. 35 (1905) 80. Panicum pallens Sw. 

 Prodr. (1788) 23; Kunth Enimi. 1 (1833) 89. P. niiens Merr. Govt. Lab. Publ. 

 17 (1904) 8. 



Luzon, Province of Bataan, Mount Mariveles (3221, 3756 Merrill) October, 

 1903, January, 1904. 



Tropics of both hemispheres. 



(31) OPLISMENUS Beauv. 



Spikelets 1-flowcred in small groups or clusters along the branches of 

 the panicle, secund; first and second glumes always awned, the third 

 frequently awned. 



Species about 6, tropical and subtropical regions of both hemispheres; three 

 in the Philippines. 



1. Spikelets about 2 mm. long, greeuish, closely imbricate, green ; 



awns capillary (1) O. hurmunnil 



1. Spikelets 3 to 4 mm. long,, loosely imbricate or scattered, often 

 purplish ; awns stout. 



2. More or less pubescent; spikes elongated (2)0. compositua 



2. Glabrous or nearly so ; spikes short or reduced to a single 



fascicle of flowers (3) O. undulatifoHiis 



