14 



1. FUIRENA UMBELLATA, Rottb. Descr. et Ic. 70. 1773. 

 Frequent in coastal marshes. Near Cold Harbour, east of Port 

 Antonio (Britton QOO). Widely distributed in tropical regions. 



2. FUIRENA SQUARROSA, Michx. Fl. Bor. Am. 1 : 37. 1803. 

 Jamaica, according to Vahl, but not found on the island by recent 

 collectors. The species is widely distributed in the eastern United 

 States and is reported from Cuba. 



10. DICHROMENA, Michx. Fl. Bor. Am. 1 : 37- 1 803. 

 Bracts of the involucre ciliate at the base 

 Spikelets capitate-spicate ; bracts white 

 toward the base I. D. ciliata 



Spikelets 1-5 ; bracts mostly green through- 

 out 2. D. radicans 

 Bracts of the involucre not ciliate 3. D. colorata 

 Type species, Dichromena leucocephala, Michx. 



1. DICHROMENA CILIATA, Vahl, Enum. II: 240. 1806. 



Rhynchospora pura, Griseb. Fl. Br. W. I. 577. 1864. 

 Grassy banks and meadows ; frequent at low and middle elevations. 

 Brandon Hill (Thompson 8101); Mansfield, Bath (Nichols 192) ; 

 near Port Antonio (Fredholm 3021), Troy (Britton 447). Widely 

 distributed in Tropical America. 



2. DICHROMENA RADICANS, Schl. & Cham. Linnaea, VI : 28. 

 1831. 



Rhvnchospora Persooniana, Griseb. Fl. Br. W. I. 377- 



1864 

 Meadow, near Hollymount (Britton 769). Widely distributed in 

 Tropical America. 



3. DICHROMENA COLORATA (L.) A. S. Hitchc. Rep. Mo. Bot. 

 Gard. IV : 141. 1893. 



Schoenus coloratus, L. Sp. PI. 43- 1753- 



Rvnchospora stellata, Griseb. Kar. 123. 1857. 



Dichromena leucocephala, Michx. Fl. Bor. Am. 1 : 37. 



1803. 

 Recorded from Jamaica by Grisebach and by Clarke and repre- 

 sented in the herbarium of the Public Gardens. Grand Cayman 

 (Millspaugh 1375). Distribution : Southern United States, West 

 Indies and Central America. 



II. RYNCHOSPORA Vahl, Enum. II: 229. 1806. 

 Style long, its branches much shorter than the lower undivided 



P art n -j 



Spikelets densely capitate I. R. cyperoides 



Spikelets in panicled clusters, not densely 

 capitate 



Tubercle nearly or quite twice as long 



as the achene 2. R. Eggersiana 



Tubercle shorter than the achene, or but 



little longer. 



Bristles about as long as the achene or 



longer 3- & corymbosa 



Bristles obsolete or none 



Spikelets fascicled, leaves 1. 5-3 



mm. wide 4- R- elongata 



Spikelets not fascicled, the clusters 



loose ; leaves 4 mm. wide 5- #■ polyphylla 



