Grasses of Porto Rico 3S3 



i6. ICHNANTHUS Heauv. Aprost. 56,/)/. 12, f. 1. 1S12 

 I. IcHNANTHUS FALLENS (S\v.) Muiiro ; Heiitli. Fl. Hongk. 414- 

 1861. 

 Paiiiiimi pa/lcNS ^w. Prod. 23. 178S. 



In wet shaded places, common. Bayamon, Heller 92 ; San- 

 tiirce, Heller 826 ; Mayaguez, Heller 4374 and 4479 ; Puente 

 Muco. GoU 884; Adjuntas road, near Ponce, Heller 6093. 



17. OPLISMENUS Beauv. Fl. Owar. 2: 14. /-/. ^cV. 1807 

 I. Oplismenl'S SETAKiis (Lam.) R. & S. Syst. 2: 481. 1817. 



Panicum sctariuni Lam. 111. i: 170. 179^- 



In moist soil, frequent. Pinon, Goll 623 ; Adjuntas road, near 

 Ponce, Heller 6303. 



18. PXHIXOCHLOA Beauv. Agrost. 53,//. //, / //• 



1812. 



I. EcHiNOCiiLOA COLONA (L.) Link, Hort. Berol. 2: 209. 1833. 

 Paiiicuin coloHiiJii 'L. Syst. Ed. 10, 870. 1759- 

 In fields and waste places, common. Catano, Heller 108 ; 



Mayaguez, Heller 4409 ; Coamo Springs, Goll 660. 



19. SACCIOLEPIS Nash, in Britt. Man. 89. 1901. 

 I. Sacciolepis striata (L.). 



Holcus striatus L. Sp. PI. 1048. 1753- 

 Panicum striatum Lam. 111. i: 172. 1791. 

 Panicum gibbinn Ell. Bot. S. C. & Ga. i : i 16. , 18 17. 

 Sacciolepis gibba (Ell.) Nash, in Britt. Man. 89. 1901. 

 Wet ground, near Santurce, Heller 1363. 



20. CHAETOCHLOA Scribn. Bull. U. S. Dept. Agric. 

 Div. Agrost. 4: i"^. 1897 



Setae at the base of the spikelet 5 or more, involucrate, aiitrorsely scabrous. 



Setae .short, not more than twice as long as the spikelet : inflorescence usually 

 slender. ^- C. purpiirasceus. 



Setae longer; inflorescence stout. 2. C. iinb^rbis. 



Setae 1-3 at the base of each spikelet, not involucrate, retrorsely scabrous above, 

 antrorsely below. 3- C- scntidens. 



