368 



Luzon, Manila (83, 366 Merrill) May, July, 1902; (34, 59 McGregor) Oc- 

 tober. 1904: Province of Cavite, Cavite (102 Foaworthv) July, 1905. I'anay 

 (Copeland) January, 1'.m>4. Oi.ion <4!>:5 Merrill) December, 1902. 



Introduced from tropical America. 



(35) PENNISETUM Pers. 



Spikelets in racemes, spikes or False spikes, narrow or ovale, single or 

 in groups of twos or threes surrounded by many slender, dissimilar 

 bristles, the first glume usually minute, sometimes obsolete. 



Species about 40. mostly of tropica] and subtropical Africa; 1 in southern 

 Europe; ;t few in tropical Asia and America; 2 in the Philippines. 



1. Slender, 0.7 m. high or less ; leaves slender, convolute (1) P. compressum 



1. Robust, 1.8 to 2 m. high; leaves flat, broad (2) P. macrottOChyum 



(1) Pennisetum compressum R. 15r. Prodr. (1810) 195; Hook. f. Fl. Brit. 

 1 ml. 7 (1897) 85; Rendle in Forbes & Bemsl. Journ. Linn. Soe Bot. 36 (1904) 

 ;{:58. Qumnothrim nigricans Presl Rel. Eaenk. 1 (1830) :i 1 "» : Kunth Enum. 1 

 (1833) 159. Pennisetum nigricans Trin. ex Steud. Nomen. ed. 2, 2 (1841) 297; 



Miq. PI. tad. Bat. 3 (1859) 470: F.-Vill. Nov. App. (1883) 313. P. cenohroides 

 F.-Vill. Nov. App. (188;?) 313, non Spreng.1 Cenohrus Kesaftorua Blanco Fl. 

 Filip. ed. 1 (1837) 38; ed. 2 (1845) 24. 



Luzon, Province of Benguet, Bagnio (5766 Elmer) March, 1904; Kabayan 

 (44:i.") Merrill) October, 1905. 



Burma to Tonkin, southern China, Japan, and Australia. 



Cenchrus hewaftorus Blanco was previously considered by the author" to be 

 a synonym of Pennisetum macrostachyum Trin.. but Blanco's description applies 

 much closer to P. compressum R.. Br. 



(2) Pennisetum macrostachyum Trin. in Mem. Acad. St. IVtersb. VI. 3 

 (1835) 177; Ceron Cat. PI. Herb. (1892) 181; Schum. and Lauterb. Fl. Deutsch. 

 Schutzgeb. Stldsee (1901) 181. Sertcttra elegant llassk. in Flora 25 (1842) 

 Beibl. 2. 



Luzon. Province of Tayabas, Atimonan (f 16 Whitford) August, 1904. Mas- 

 bath (.'5:581 Merrill) November. 1903. Mindanao, Lake Lanao, Camp Keithley 

 (499 Clemens) April. 1900; Mount Malindan<r (47L r > Mcarns d Hutchinson) 

 May. 1900. 



Java to New Guinea and Polynesia. 



(36) CHAMAERAPHIS II. Br. 



Spikelets few on (lie branches of a simple panicle 1 , the branehlets 

 produced beyond the terminal spikelet as an awn-like bristle, the pedicels 

 falling with the spikelets, the first empty glume very short. Tost rate 

 aquatic grasses. 



Species about 5, tropical Asia. Malaya, Australia, and America; 1 in the 

 Philippines. 



(1) Chamaeraphis aspera (Keen.) Nees in Wall. Cat. (18-28) No. SH79; 

 Mez in Perk. Frag. Fl. Philip. (1904) 145. Panicum asperum Koen. in Naturf. 

 23 (1788) 209. P. spinesoens It. Br. Prodr. (1810) 19:5; Kunth Enum. 1 (18:s:5) 

 209. Chamaeraphis spincscens Poir. in Lam. Encycl. Suppl. 2: 18!) : F.-Vill. Nov. 



" Publication* of tin- Bureau of Government Laboratories, Manila (1905), No. 

 27, 91. 



