1915] 



BRITTON VEGETATION OF MONA ISLAND 49 



GUETTARDA ELLIPTICA Sw. 



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



STENOSTOMUM ACUTATUM DC. 



Frequent on the coastal plain and on the plateau: Porto Rico; Curacao. 



ERITHALIS FRUTICOSA L. 



Common on sand dunes, on the coastal plain and occasional on the plateau: 

 Porto Rico; Hispaniola; Bahamas; Curacao. 



CHIOCOCCA ALBA (L.) Hitchc. 



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

 Bahamas. 



STRUMPFIA MARITIMA Jacq. 



Limestone plateau near Ubero, frequent: Porto Rico; Hispaniola; Bahamas; 

 Curacao. 



PSYCHOTRIA UNDATA Jacq. 



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



ERNODEA LITTORALIS Sw. 



Common on coastal sands: Porto Rico; Hispaniola; Bahamas; Bonaire. 



SPERMACOCE TENUIOR L. 



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



CUCUMIS ANGURIA L. 



Cultivated ground, Sardinera: Porto Rico; Hispaniola; Curacao. 



EUPATORIUM ODORATUM L. 



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



EUPATORIUM ATRIPL1C1 FOLIUM Lam. 



Coastal rocks, Sardinera: Porto Rico; recorded from Hispaniola and from 

 the Bahamas. 



LEPTILON PUSILLUM (Nutt.) Britton 



Common in waste and cultivated grounds, coastal plain: Porto Rico; His- 

 paniola ( ?) ; Bahamas. 



LEPTILON BONARIENSE (L.) Small 



Cultivated ground, Sardinera: Porto Rico; Hispaniola. 



PLUCHEA PURPURASCENS (Sw.) DC. 



Borders of marshes, coastal plain: Porto Rico; Hispaniola; Bahamas. 



BORRICHIA ARBORESCENS (L.) DC. 



Occasional on coastal rocks: Porto Rico; Hispaniola; Bahamas. 



WEDELIA PARVIFLORA L. C. Rich 



Common on the coastal plain : Porto Rico. 



ELEUTHERANTHERA RUDERALIS (Sw.) Sch. Bip. 



Cultivated ground, coastal plain: Porto Rico; Hispaniola. Erroneously 

 recorded from the Bahamas. 



BIDENS CYNAPIIFOLIA HBK. 



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



Bahamas; Curacao. 



PTERIDOPHYTA 

 (Determined by Miss Margaret Slosson) 



ADIANTUM FRAGILE Sw. 



Limestone cliff, Sardinera: Porto Rico; Hispaniola. 





