10 



707), but obtained by the earlier collectors. Grand Cayman (Mills- 

 paugh 1296). Common in the West Indies. 



35. CyperUS FERAX, Rich. Act. Soc. Hist. Nat. Paris' 



1 : 106. 1792. 



Cypcrus flexuosus, Vahl, Enum. II : 359. 1806. 

 Tonili)niim confertum, Hamilt. Prodr. Fl. Ind. Occ. 

 15. 1826. 

 Toriilinium ferax, Urban, Symb. Ant. II: 165. 1900- 



Common in swamps and along streams at low and middle eleva- 

 tions. Hartford, near Priestman's River (Maxon 2531) ; near St. 

 Paul (Marble 699) ; Troy (Maxon 2930 ; Britton 471) ; Mona (Harris 

 8939), Widely distributed in warm and tropical parts of America. 



36. Cyperus Vahlii, (Nees) Steud. Syn. PI. Cyp. 48. 1855- 



Dididiiim Vahlii, Nees in Mart. Fl. Bras. II : 53. 1843- 

 Cyperus flexuosus, Griseb. PI. Cub. 238. 1866. Not 

 Vahl. 1806. 



Collected in Jamaica by Wilson as cited by Clarke ; Jamaica 

 Plants No. 844. Cuba ; Haiti ; Windward Islands. 



37. Cyperus SPECIOSUS, Vahl, Enum. II : 364. 1806. 



Cypcrus Miclmuxianus, Schultes in R. & S. Syst. II : 

 Mant. 123. 1824. 



Torulinium Michauxianum, Clarke in Urban, Symb. Ant. 

 II : 56. 1900. 



This species of Eastern North America is cited by Clarke as col- 

 lected in Jamaica by W. Wright. 



Cyperus ALTERTNIFOLIUS, L., a widely cultivated ornamental 

 species, native of Tropical Africa, has escaped from Castleton 

 Gardens and become established along the Wag Water River as 

 observed by Mr. William Harris. 



3. ELEOCHARIS, R. Br. Prodr. Fl. Nov. Holl. I: 224. 1810. 

 Spikelet cylindric, scarcely or not at all thicker than the culm ; 

 scales coriaceous, not keeled 



Culms terete, nodose I. E. interstincta 



Culms angled, continuous 2. E. mutata 



Spikelet ovoid or oblong, thicker than the 

 culm ; scales membranous, keeled. 



Style-branches 2 ; achene lenticular or 

 biconvex 



Upper sheath with a membranous hya- 

 line limb ; rootstock slender 3- ^- flaccida 

 Upper sheath i-toothed ; rootstock none 4. E. capitata 

 Style-branches 3 ; achene 3-angled 

 Culms continuous 



Culms setaceous or filiform 



Achene cancellate ; spikelet 1-4 

 flowered 5. E. retroflexa 



Achene smooth ; spikelet 8-10 

 flowered 6. E. microcarpa 



Culms slender 7- E. aUnda 



Culms stout, pseudo-septate, constricted 

 under the spikelet 8. E. geniculata 



Type species Scirpiis palustris, L. 



