150 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



it OypeU'ua eaeulentua I Bp. PI, 1:45. i. 



l iebm. Dansk. Vid, Selsk. Bkr. 2: 22. L848. 

 Distbibi n<»\ : Warmer regions of the whole world. 



\ Km \n collections Puerto 1 .inn .ii. I'itti'f 4214; Talamanca, Toruhu 

 15. Cyperus radiatus Vahl, Bnum. 2: 



Schrad Nees, Marl I'l 9 1 842. 



Distbibi ii"\ Very common in warm regions of the <»l-l World; somewhat rare in 

 i hose of the Sen World. 

 Costa Rh w collection San Carlos, Tondus 2592. 

 [Cyperds bacbolepis Boeckl. in Kneuck. Allgem. Bot. Zeitsch. I: 



ented by Tordut no. 8185, appears to have been overlooked by Mr, I Larke. 

 Bditob. ] 



SPECIES OP CYPEBUS TO Hi. LOOKED rOH in COSTA RICA. 



( xt] i.-i - -i -i i Riomi s II. B. K . Nov. Gen. & Sp. 1: 209. L815. 



Distbibi pion: Common in Central America; in South America rare. 



Differs from C. tenerrimus Presl, in thai its Btems are ligneous at base, nodose- 

 thickened, and fascicled on a very shorl rootetock; also in some other points. 

 I rPERi - m Miiis Kunih. Bnum. 2: 23. I s ".7. 



Distbibution: I n < Cnual America, where it Ls of frequent occurrence. 



Differs from C. tenerrimus Presl, among other thingB, in that the glumes are oeither 

 cymbiform nor curved. 



I TPEBUS LMABILIS Yahl, Knuin. 2: 318. L8( 



Cyperus aureus II. B. K. Nov. Gen. & Sp. 1: 205. L815, not Georgi. L802. 



Cyperu8 glareosus Liebm. Dansk. Vid. Selsk. Skr. 2: L6. l s -~><>. 



I >istbibi now : Throughout almost all warm countries; frequenl in < Central America. 



Differs most uotably from C. uncinatus Poir. in that the mucro of the glume is not 

 uncinate, but straight, short, or even wanting 

 Cypbbi - 0( BBACEl S Yahl. Knum. 2: 325. li 



Distbibi tion: Centra] America, common! 



Differs from C. sunnamensis Rottb. among other points in that its glume is slightly 

 inflated rather than compressed; from C. wrens ftiichx. in thai the trigonous apei of 

 it- stem is nearly smooth. 

 I Iypebi - eleoans L. Sp. PI. ed. 2.. 1 : 68. 17<; - _ ) . 



Cyperus viscosus Sw. Prod. Veg. End. Occ. 20 



Distbibution: Common in tb Wesl 1 tk 1 i< -s : frequenl in other parts of tropical 

 America. 



Differs from its allies in thai its steins and foliage arc usually minutely viscid- 

 pubescenl . 

 I rpEBi s PBOLixus II. B. K. Nov. Gen. & Sp. 1: 206. L815. 



Comostemum schotHi Noes. Linnaea 9: 283. L834. 



Cyperus amplissimus Steud. Syn. PI. Glum. 2: 316. l s ">">. 



Distbibution: Warmer parts of America, frequent. 



\ showy Bpecies, allied to C. distant L. f. Stem I to L.5 meters Long !• 

 50 to LOO cm. Long, I to 2 cm. wide. Umbel 40 to 60 cm. in diameter and copious. 

 Spikelets L5mm. Long, LOto I s : flowered, pale or brick-reddish. 



< 'ypkim S akth I i \ 1 1 - I.. Sp. PI. 1 : 44. IT 



Distbibution: Almost all warm regions throughout the world 



Stem- stout, L0 to 20 cm. Long, terete, false-septate, Bracts of the umbel almost 



none 



