CLARKE — THE CYPERACEAE OF COSTA RICA. 463 



Rynchospora presleana Steud. loc. cit. 



Rymho8pora pohliana Steud, loc. cit. 



Distribi tion: From Mexico to Brazil, rather common. 



Costa Rican collection: San Jose\ altitude l,100meters, Tonduz 132. 



2. Rynchospora cyperoirles Sw. i Mart. Denkschr. Acad. Wish. Muench. 6: 149. 



L816 17. 

 Schoenus cyperoides Sw. Prod. Veg. tnd. Occ. I". I.- 

 Schoenus fragiferus Rudge, PI. Guian. L5. pi. i, L805 

 Rynchospora poly cephala Wy dler; Kunth, Enum. 2: 291. L837. 

 Ephippwrrynchium polycephalum Neea in Mart. Fl. Bras. 2 : L34. pi. I :. 1842. 

 Distribution: Tropical Africa, rare; in Vmerica and the Wcsl Indies, frequent. 

 Costa Ri< w collection: Guanacaste, Pittier2707. 



3. Rynchospora aurea Ya hi. Enum. 2: 229. L806.a 

 Scirpvs corymbosus L. Amoen. Acad. 4: 303. L759. 



Schoenus surinamensis Rottb. Descr. iV; !<■ 68. pi. H.j. I. L773. 



Calyptrostylis fascicularis Nees in Mart. Fl. Bras. 2 : L39. L843. 



Distribi tion : Tropical regions of all continents, very common 



Costa Rn \\ collection: Pittier & Tondm in Brussels Herbarium. 

 I. Rynchospora polyphylla \\i hi. Enum. 2: 230. 1806. 



Schoenus polyphyllus Vahl, Eclog. Am. 2: 5. L79£ 



Mitrospora polyphylla Nees, Linnaea 9: 295. L834. 



Rynchospora costaricensis Boeckl. Allgem. Bot. Zeitsch. 2: I M>. L896. 



Distribution: Central America, Wesl Indies, Venezuela, frequent. 



Costa Rican collections: BuenosAires, Pittier 3648; Boruca, altitude I50meters, 

 Tondui 1483. 



5. Rynchospora schiedeana Kunth, Enum. 2: 300. L837. 

 Calyptrostylis paniculata Liebm. Dansk. Vid. Selsk. Skr. 2: 64. L849. 



A meter high; leaves L5 mm. wide; panicle 50 cm. 1 < • r i -_r . L0 cm. wide; corymbs 

 decompound, spikeleta subsolitary, 7 to 8 mm. long, style scarcely divided; nut 

 broadly ellipsoidal, smooth, lightly cancellate; beak long-conical, of three-fourths 

 the length of the nut . 



Distribi tion: Mexico. 

 5a. Rynchospora schiedeana varica ('. B. Clarke, subsp. nov. 



Rynchospora schiedeana Eemsl. Biol. Centr. Am. 3: 467. L885, synonyme excluded. 



Branches of the terminal panicle several, long, Blender, divaricate, crowned al 

 summit with pyramidal panicles. 



Type U. S. National Eerbarium no. 578583. 



Distribi tion : Mexico, < 'osta Rica. 



Costa Rican collection: El Copey, altitude L, 800 meters, Tondm L1736 



6. Rynchospora locuples C. B. Clarke. Engl. Bot. Jahrb. 34 Beibl. 78: 5. L904. 

 Stem a meter high; leaves L2 to 17 nun. wide; panicle 10 cm. long, 12 cm. broad, 



rather dense, excessively many-flowered; partial panicles pyramidal, rigid, com- 

 pound; spikelets indefinitely many, 3 to I nun. long, lanceolate, straw-colored, 

 maturing bu1 one nut; nut I to L.5 nun. long, oblong-ellipsoid, pale, reticulate; 

 beak oblong-linear, longer than the utricle, whitish: bristles irregular, whitish, 

 rigid, retrorsely barbed, some as long as the nut, some twice as long, sometimes 

 almost obsolete. 



Collected by Tonduz (no. 11919) at El Copey, Costa Rica, altitude 1,800 meters. 

 Also Bogota, < "olombia, Lindig 1 1 in. 



Species allied to R. schiedeana Britton differing by its small and innumerable 



.-pikelets 



•• The specific name rorymbosus is older and unoccupied. Editor. 



