H v CONTRIBUTIONS PEOM I ill. NATIONAL HERBARIUM. 



lets Bpical 1. < BORMT \< in 



Annual. 



ircely wring 

 < Humes rather obi use 12 latut. 



Glumes acute, murronulatt L3 ( ' ctmjm 



Rachilla ■■!' spikelets \\ inged nnual 15 ( 



I'. rennial. 



■II- many, slender, disappearing 11. ( esculenl 



1. Cy nerximufl J. 3. A C. B Prt a] !:• I 1! •• nk I 



Liebm. I>an~k. Vid Selsk ski 2: _'<• 

 Cypt Boeck. Linnaea 88: 363. l s 7i 



Annual, Btem monocephalous; bracts I to 8, vcr) long, grassy; glumce elliptic, 

 cymbiform, curved, obtus< te, ] >;i 1 « - cinnamon color; Btylc 3-fid; nut < • I > 1 « • 1 1 *_: . 



of two-thirda the length of the glume. 



Di8tribi ri'>\: Central America, somewhat rare. 



\ Rn w collections: Littoral zone, Salinas Bay, Tonduz 2713, 

 Nicoya, Tondtu L3741. 



2. Cyperus uncinatus Poir. Encyc. 7: L'I7. L806. 

 Cyperus euspxdatus II B. K. Nov. Gen. & Sp. 1: 204. L815. 

 CyjH .1 S & C. B. Preel, IM Baenk. 1: L68 L830 

 Cyperus hamulatus Kunth, Enum. 2: 22. L837. 



DisTRiBi n<>\: In almost all warm countries; in Central America rather rare. 

 Costa Rican collections: San Jose*, Tonduz 8606. 



3 Cyperus haspan I. Sp. PI. 1: 15. 1753. 



Cyperus aphyllus Vahl, Eclog. Amer. 2: <>. 



Cyperus nudus 11. B. K. Nov. Gen. A: Sp. 1: 203. L815 



Cyperus adenophorus Schrad. ; NeesinMart. l-'l. Bras. 21:28 1842. 



Cyperus e/oliatus Boeckl. Allgem. Bot. Zeitech. 1:226. 1895. 



Distribution: Throughout nearly all warmer regions; often a troublesome weed in 

 fields. Very common in Central America. 



\ Ri< w collections: Pittier <(• Tondui 3804b; La Cruz de Guanacaste, 

 I'i/tnr 2714; Turrialba, altitude 500 meters, Tondm 8304; (ana- Gordas, altitude 

 1,100 meters, Tondtu L0952. 



Tonduz ii". 8304 Is a large specimen, the stem a meter high, 5 nun. in diameter at 

 Bummit. The spikelets are altogether those of typical Cyperus haspan. The sum- 

 mit of the stem is notably punctate with stomata. The Btemsin Tit tier's no. 27 14 are in 

 like manner punctate. < >ld World specimens are usually much smaller, and with 

 the stomata on the stem indistinct; nevertheless, there occur in the Old World large 

 specimens, the long Btems dotted with stomata at Bummit, but they are more rare here 

 than in America. 



I. Cyperus alternifolius L. Main. 28. 1767. 



Distribution: Madagascar and Bourbon, where n 1- perhaps indigenous; exten- 

 sively cultivated. 



3ta Rican collections: Public parks at San .lose, altitude L,100 meter-. 

 Tondm L0888 



This plant 1- perhaps C. jUibeUiformis Rottb., forma hortensisl C. flabelHformit 

 Rottb. is common in Africa and widely dispersed 



5 Cyperus canus .1 . S. A I . I'.. Preel, Rel. Haenk. 1: 17!). 1828. 



Dioecious, Leafless; stem I m. high, robust; bracts 6 to L2, equal, Burpassing the 

 iimi. el; this ample, I to :; dm. 1> road, compound and even decompound; spikeleta 

 almost countless, digitately clustered :'. to 8 in a place; style 3-fid. 



Distribution: Peculiar to Central America, where it is of frequent occurrence. 

 i\ Rn w '"in, noNs: Hoffmann 11; Huebsch. A remarkabli 



