368 



Luzo.x, Manila (83, .SOU Merrill) May, July, 1!)02; (34, 50 McGregor) Oc- 

 tober, 1904: Province of C'avite, Cavite (1G2 Foxworthy) July, 1905. Panay 

 (Copchivd) January, 1904. Culion (493 Merrill) DoccnilxT. 190-2. 



Introduced from tropical America. 



(35) PENNISETUM Pers. 



Spjkolt'ts ill rac-t'iin's, spikes or {'also spikes, iiari'ow or ovate, single or 

 in groups of twos or tlirecs surrounded l)y inany slender, dissimilar 

 bristles, the first glume usually minute, sometimes obsolete. 



Species about 40, mostly of tropical and subtiopical 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. macrostachyum 



(1) Pennisetum compressum 11. Br. Prodr. (1810) 105; Hook. f. Fl. Brit. 

 Ind. 7 (1807) 85; Rcndle in Forbes & Hemsl. Journ. Linn. Soc. Bot. 36 (1904) 

 338. Gymnothrix nigricans Presl Rel. Haenk. 1 (1830) 315; Kimth Enum. 1 

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

 Miq. FI. Ind. Bat. 3 (1859) 470; F.-Vill. Nov. App. (1883) 313. P. cenchroides 

 F.-Vill. Nov. App. (1883) 313, non Spreng.? Cenchrus hcxafloriis Blanco Fl. 

 Filip. ed. 1 (1837) 36; ed. 2 (1845) 24. 



Lrzox, Province of Benguet, Bagnio (5756 Elmer) ]\Iarch, 1904; Kabayan 

 (4435 Merrill) October, 1905. 



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



Cencltrus hexaflorus Blanco was previously considered by the author " to be 

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

 much closer to P. co)iiprcssiin> R. Br. 



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

 (1835) 177; Ceron Cat. PI. Herb. (1892) 181; Schum. and Laiiterb. Fl. Dcutsch. 

 Schutzgeb. Siidsee (1901) 181. Sericura elegans Hassk. in Flora 25 (1842) 

 Beibl. 2. 



Luzon, Province of Tajabas, Atimonan (716 M'hUford) August, 1904. ]\Ias- 

 BATE (3381 Merrill) November, 1903. Mindanao, Lake Lanao, Camp Keithley 

 (499 Clemens) April, 1906; ^Nlount ]\Talindang (4715 Mearns d- JTulchinHon) 

 May, 1906. 



Java to New Guinea and Polynesia. 



(36) CHAMAERAPHIS 1!. Br. 



Spikelets few on the brauehes of a simple paniele, the branehlets 

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

 falling with the spikelets, the first em])ty glume very short. Postrate 

 aquatic grasses. 



Species about 5, tropical Asia, Malaj'a, Australia, and .Xuicriea ; 1 in the 

 Philippines. 



fl) Chamaeraphis aspera (Koen.) Nees in Wall. Cat. (1828) No. 8679; 

 Mez in Perk. Frag. I'l. Pliiiip. (1904) 145. Panictim (isprnim. Koen. in Naturf. 

 23 (1788) 209. P. sptViescens R. Br. Prodr. (1810) l!t.•^. Kunlh Kiunn. 1 (1833) 

 209. Chamaeraphis spinescens Poir, in Lam, Encvcl. Siipjil. 2: IS!); I'.A'ill. Nov. 



^* T'lihliriirioiis of the Bureau of Government Ltilioralories, .Manila (1905), No. 

 27, 91. 



