15 



Style short, its branches about as long as 

 the lower undivided part. 

 Bristles none 



Spikelets 1-2 mm. long 6. R. micrantha 



Spikelets 3-6 mm. long 



Achene not 3-toothed 7. R. Berterii 



Achene 3-toothed at the summit 8. R. sctacea 



Bristles present, upwardly barbed 



Achene smooth 9. R. fascicularis 



Achene cancellate 10. R. cephalotes 



Achene transversely wrinkled 



Bristles shorter than the achene ; 

 spikelets filiform-peduncled II. R. rariflora 



Bristles as long as the achene or 

 longer ; spikelets not filiform-pedun- 

 cled 



Achene not stipitate ; spikelets 

 about 3 mm. long 12. R. glauca 



Achene stipitate ; spikelets 5-7 

 mm. long 13. R.jnhata 



Type species, Rynchospora aiirea, Vahl. 



1. RynchOSPORA CYPEROIDES (Sw.) Mart. Denksch. Acad. 

 Wiss. Muench. VI: 149. 1816-17. 



Sclioetius cyperoides, Sw. Prodr. 19. 1788. 

 Meadow between Oxford and Wallingford (Britton 692) ; Oxford 

 (Harris 9441). Not recorded by Clarke from Jamaica, but duly re- 

 corded by Grisebach. Widely distributed in Tropical America. 



2. RYNCHOSPORA EGGERSIANA, Boeckl. Cyp. Nov. II. 26. 

 1890. 



Rynchospora florida, Griseb. Fl. Br. W. I. 575. 1864. 



Rynchospora aristata, Clarke in Urban, Symb. Ant. II : 



115, in part, 190O. 

 Common in mountain woods. St. Catherine's Peak (Eggers 3596, 

 type ; Blue Mountain Peak (Shreve) ; John Crow Peak (Britton 276) ; 

 Morce's Gap (Nichols 42 ; Britton 917); Cinchona (Underwood 468; 

 Shreve ; Britton 63). Endemic. Differs from the Mexican and 

 South American R. aristata, Boeck. by its shorter tubercle, longer 

 bristles and more conspicuously cancellate achene. 



3. Rynchospora CORYMBOSA (L.) Britton, Trans. N. Y. 

 Acad. Sci. XI : 85. 1902. 



Scirpus corymbosiis, L. Sp. PI. 76. 1753- 

 Rynchospora aiirca, Vahl, Enum. II. 229. 1806. 

 Schoenus surinamcnsis, Rottb. Descr. et Ic. 68. 1773- 

 Rynchospora siirinamcnsis, Nees, Linnaea, IX : 297. 1834. 

 Marshes, Port Antonio (Britton 859). Not otherwise known from 

 Jamaica, except as cited by Grisebach, collected long ago by 

 Swartz, and not referred to by Clarke. 



4. Rynchospora elongata, Boeckl. Cyp. Nov. I .- 261. 



1888. 



On shaded banks and in bogs at higher elevations. New Haven 

 Gap (Shreve) ; near Cinchona (Britton 132); Morce's Gap (Britton 

 914). John Crow Peak (Britton 196) ; Sir John Peak (Britton 279) ; 

 slopes below Sir John Peak (Harris 9550). Distribution : Jamaica; 

 Porto Rico ; Guadaloupe. 



