CLARKE TTTF. CVPERAC^EAK <iF COSTA RICA. 457 



Limnochloa ail y pi rat a Liel^m. Dan^^k, Vid. S*^lsk. Skr. 2: Tifi. 1S49, 

 ndeocham ralyplrafa StOLul. Syn. Tl. Glnrn. 2; SI. 1855. 

 Hf'iforhans rothiana \liiivU. I'l(.>ra43: 3. ISGO. 

 Heleocharis f marginal a Kiol'AHvh; Tioeckl. T^iniiaca 36: 4A?,. 1870. 

 TTrlfocharis coslaricfnfiifi Boorkl. Allgem. Bot. Z^iit^vh. 2: 34. 189C. 

 Ildeocharis purpurco-vaginata Boockl, loc. cit. 

 Distribution: From Mexico to Argentina; vory c^ommon. 



Costa Rican collections: Cafia.^ Gorda?, altitude 1,100 meters, Fitder 11020; 

 Buenot^ Aires, altitude 300 meters, Tonduz 4884; Boruea, altitude 450 meters, Tomiaz 



4637. 



1!K)0. 



12. Eleochaiis pachystyla C. B. <"kirko in T^rb, Synib. Aiitilk 2: 72. 

 Snrpus pachjsfijlas C. Wright in Sauv. Fl. Cub. 174. 1873. 

 Distribution: Cuba, Vencv.uela, Trinidad, Guiana, Pernamlmeo, Costa Rica. 

 Costa Rican collection: Cauas Gurdas, altitude 1,100 meters, Pillkr 11025. 



13. Eleocharis geniculata R. Br. Prod. Fl. No^ . IL.IL 224. 1810. 

 Sdrpns geniculataa L. Sp. PI. ed. 2. 1: 71. 1762, in part. 



Eleocharis constrida Schult. in Roem. k Scbult. Syst. Manl. 2: 87. 1824. 



Limnochloa geniculata Neos in Mart. Fl. Bras. 21: 99. 1842. 



Distribution: From Mexico to Uruguay, very common. 



Costa Rican collections: Boruca, altitude 450 meters, ro?i(i/^2 3843, 463G; Agua 

 Caliente, altitude 1,300 meters, Pittier 107; Rio Tin's, altitude (>00 meters, Tonduz 

 11390; Turrialba, altitude GOO meters, Pttller 14254, Tonduz 8300; La Palnia, altitudi; 

 1,500 meters, Pittier 10187; Talamanca, altitude 100 meters, Tonduz 9219; Desampa- 

 rados, Biolley 3405, Tonduz 1501; Carrillo, altitude 300 meters, Pittier, 1184. 



ELEOCHARIS SPECIES TO BE LOOKED FOR IN COSTA RICA. 



Eleocharis Montana Roem. & Schult. Syst. 2: 153. 1817. 

 Seirpus montanus H. B. K. Nov. Gen. <& Sp. 1: 220. 1815. 

 Limnochloa truncafa Liebm. Dansk. Vid. Selsk. Skr. 2: 50. 1849. 

 Distribution: Very common in Central Americ^a and occurring almost throughout 



the warmer parts of America. 



Related to E. sulcata Nees, but difforing in its longer, stouter rliizome and yellow 

 nut, as well as in minor particulars. 



7. FIMBBISTYLIS Vahl. 



Glumes several or many, ind>ricated all around or (in section Abilgaardiaj the low( r 

 somewhat 2'ranked; 1 to 3 lower vacant ; several lower ilowers Ijisexual and perfecting 

 nuts; hypogynous bristles none; stamens 3 to 1, aTiterior, style branches, 3 or 2, 

 linear; style Ijase separated from the nut by a constriction or a line and deciduous 

 with it; nut trigonous or plano-convex, sessde orsul)stipitate.— Siulons none. Stems 

 naked, i. e,, nodes and leaves all nearth(^base of the stem. Inflorescence umbellate, 

 or monocephalous, or of a single spike. 



Species 130, dispersed in warm countries (everywhere, especially in the Old Worhl; 



unknown in either mountainous or cold regions. 



KEV to the species. 



Style branches 2. (Dichelostvlis.1 



Nut conspicuously 5 to 9-costate on both faces 1 . ^- diphylla. 



Nut rather obsc\u-ely reticulate, not costate lengthwise. 



Spikelets ellipsoidal, ol>tusish 2. 7^. casfanca. 



Spikelets subcyliiidri(*, narrowed at apex 3. F. .spadura. 



