1915] 



BRITTON VEGETATION OF MONA ISLAND 37 



I append a list of the species collected as thus far deter- 

 mined, and have indicated in this list their known distribution, 

 except that of the lichens and Vredinales, as regards Porto 

 Rico, Curasao, Hispaniola and the Bahamas, the nearest lands 

 to Mona. 



The names of new species, and new binomials, are printed 

 in heavy face type. 



List of Species inhabiting Mona Island 



MONOCOTYLEDONS 



VALOTA INSULARIS (L.) Chase 



Common on the coastal plain and on the plateau: Porto Rico; Hispaniola; 

 Bahamas; Curacao. 



SYNTHERISMA DIGITATUM (Sw.) Hitchc. 



Frequent in cultivated ground, coastal plain: Porto Rico; Hispaniola; 

 Bahamas. 



PASPALUM CAESPITOSUM Fluegge 



Frequent on the coastal plain and on the plateau: Porto Rico; Hispaniola; 

 Bahamas. 



PASPALUM SIMPSONI Nash 



Collected by Professor Stevens, not found by us: Porto Rico; Bahamas. 



PANICUM TJTOWANAEUM Scribn. 



Frequent on the coastal plain and on the plateau: Porto Rico; Desecheo; 

 [Cuba; Guadeloupe]. 



PANICUM BARBINODE Trin. 



Sandy soil, Playa de Fajaro: native of South America. Naturalized in the 

 West Indies. 



PANICUM ADSPERSUM Trin. 



Moist soil, coastal plain: Porto Rico; Bahamas. 



PANICUM MAXIMUM Jacq. 



Frequent on the coastal plain: Native of tropical Africa; naturalized in the 

 West Indies. 



LASIACIS DIVARICATA (L.) Hitchc. 



Frequent in thickets, coastal plain and plateau: Porto Rico; Hispaniola; 

 Bahamas. 



CHAETOCHLOA SETOSA (Sw.) Scribn. 



Frequent on the coastal plain : Porto Rico ; Hispaniola ; Bahamas ; Curacao. 



CHAETOCHLOA CAUDATA (Lam.) Scribn. 



Occasional on the coastal plain: Desecheo; [Jamaica; Cuba; St. Thomas]. 



CHAETOCHLOA. IMBERBIS (Poir.) Scribn. 



Frequent on the coastal plain: Porto Rico; Hispaniola; Bahamas. 



CENCHROPSIS MYOSUROIDES (HBK) Nash 



Frequent in cultivated ground on the coastal plain: Bahamas; Cuba. 



