368 
Luzon, Manila (83, 300 Merrill) Maj^ July, 1902; (34, 59 McGregor) Oc- 
tober, 1904: Province of Cavite, Cavite (102 Foxworthy) July, 1905. Panay 
(Copeland) January. 1904. Culion (493 Merrill) December, 1902. 
Introduced from tropical America. 
(35) PENNISETUM Pers. 
Spikelets in racemes, spikes or false spikes, narrow or ovate, single or 
in g'ronps of twos or tlirees snrronnclecl by many slender, dissimilar 
bristles, the first glume usually minute, sometimes obsolete. 
Si^ecies about 40, mostly of tropical and subtropical Africa ; 1 in southern 
Europe; a 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, 1.5 to 2 m. high ; leaves flat, broad (2) P. macrostacliyum 
(1) Pennisetum compressum R. Er. Prodr. (1810) 195; Hook. f. FI. Brit. 
Ind. 7 (1897) 85; Rendle in Forbes & Hemsl. Journ. Linn. Soc. Bot. 36 (1904) 
338. Oymnothrix nigricans Presl Rel. Haenk. 1 (1830) 315; Kunth Enum. 1 
(1833) 159. Pennisetum nigricans Trin. ex Steud. Nomen. ed. 2, 2 (1841) 297; 
Miq. FI. Ind. Bat. 3 (1859) 470; F.-Vill. Nov. App. (1883) 313. P. cenohroides 
F.-Vill. Nov. App. (1883) 313, non Spreng. ? Genchrus hexaflorus Blanco FI. 
Filip, ed. 1 ( 1837) 30; ed. 2 (1845) 24. 
Luzon, Province of Benguet, Baguio (5756 Elmer) IMarch, 1904; Kabayan 
(4435 Merrill) October, 1905. 
Burma to Tonkin, southern China, Japan, and Australia. 
Genchrus hexaflorus Blanco was previously considered by the author** to be 
a synonym of Pennisetum. macrostachgum Trin., but Blanco’s description applies 
much clo.ser to P. compressum. R. Br. 
(2) Pennisetum macrostachyum Trin. in Mem. Acad. St. Petersb. VI. 3" 
(1835) 177; Ceron Cat. PI. Herb. (1892) 181; Sebum, and Lauterb. FI. Deutsch. 
Schutzgeb. Siidsee (1901) 181. Sericura. elegans Hassk. in Flora 25 (1842) 
Beibl. 2. 
Luzon, Pi-ovince of Tayabas, Atimonan (716 Whitford) August, 1904. Mas- 
i!ATE (3381 Merrill) November, 1903. Mindanao, Lake Lanao, Camp Keithley 
(499 Glcmens) April, 1906; Mount Malindang (4715 Mearns tC- Hutchinson) 
May, 190(i. 
Java to New Guinea and Polynesia. 
(36) CHAMAERAPHIS R. Br. 
S]iikelets few on the branches of a simple panicle, the branchlets 
produced beyond the terminal spikelet as an awn-like bristle, the pedicels 
falling with the spikelets, the first empty glume very short. Postrate 
acjuatic grasses. 
Species about 5, tropical Asia, Malaya, Australia, and America; 1 in the 
Philippines. 
(1) Chamaeraphis aspera (Koon.) Nees in Wall. Cat. (1828) No. 8679; 
Mez in Perk. Frag. FI. Philip. (1904) 145. Panicum. aspe.rum Koen. in Naturf. 
23 (1788) 209. P. spinesceiis R. Br. Prodr. (1810) 193; Kunth Enum. 1 (1833) 
209. Chamaeraphis spinescens Poir. in Lam. Encycl. Suppl. 2: 189; F.-Vill. Nov. 
^^Publications of the Bureau of Government Laboratories, Manila (1905), No. 
27, 91. 
