6 CYPERACEAE juss. (Cyperus.) 



Iicllam superante; foliolis planis, margine scaLriusculis; spicis 

 lincaribus, acuiis, comprcssis, 26-36-floris ; stiuamis late ovatis, 

 obtusis, carinatis, tlorso obsoletc sub5-ncrviis, ijallidis, carina 

 viridi, dorso obsolctc fusco-lineolaiis; staminibus 2; stylo bi- 

 fido ; achcnio obliquc subrotundo-obovato, latcribus comprcsso, 

 apicato, punctulato-scabriusculo, nigro -castaneo, squama dimi- 

 dio brcviorc. C. stramineus Desfonl. in JVilld. herb. n. 1329. 

 LinJi. Jalirh. 3. 84. — Patria? — Varietas C. flavesccntis spi- 

 cis pallescentibus?; diflfcrt radiis clongatis fructibusque obsoleto 

 punctulato-scabriusculis. Nonnisi frustulum foliis destitutum sup- 

 2>etit. Nomen mutavi ob distinctissimum C. stramineum JVees. 



9. C. RIVULAIIIS. Culmo triangulari, glabro ; foliis culmo 

 brevioribus, carinato-planis , glabriusculis ; umbella 3-4-radia- 

 ta; radiis valde inaoqualibus, apice 3-6-stacbyis; involu- 

 cro 3-phyllo, umbcllam supcrantc; spicis spicato-subdigi- 

 tatis, late linearibus, oblusiusculis, compressis, 20-25-floris; 

 squamis ovatis, obtusis, carinatis, dorso sub5-nei'viis, carina vi- 

 ridi, altero latere flavescente, altcro aut toto sanguinco -casta- 

 neo aut nonnisi macula sanguineo-castanca notato; staminibus 2 ; 

 stylo bifido ; acbcnio obovato-clliptico, lateribus comprcsso, mu- 

 cronato, punctulato-scabriusculo, jjallide fusco, margaritacco-ni- 

 tidulo, squama dimidio breviore. C. Nutlallii Beyrlch. hcrh. ho- 

 reali-americ, iiec Torrey. C. fiavesccns JVilld. herh. n. 1357. 

 fol. 4. — Georgia, ad rivulos. 7\> — DifTcrt a C. flavcsccnte, 

 cui proximus, umbellae radiis elongatis, rliaclieola epunctata, 

 squamis uno latere sanguineo-castaneis, aclicnio dimidio majore, 

 obovato-elliptico (ncc subrotundo-obovato), scabriusculo, pallido 

 fusco, uiargaritaceo-nilidulo. 



10. C, DIA>'r)RUS Torrey, Caf. of pl of lSew-YorT<. Schnll. 

 Mani. 2. 103. Torretj, Flora of ihc' Unif. 'Slal. 1. 60. Culmis 

 triangularibus, glabris ; foliis cnlmo longioribus, carinato-planis, 

 glabriusculis; umbclla subquadriradiata; radiis inaequalibus, 7-8- 

 stacliyis; involucro tripbylio, umbellam superantc; spicis spica- 

 tim dispositis, patentissimis, lineari-oblongis, compressis, acutis, 

 12-16-iloris; squamis ovatis, apicc rotundaiis, carinaiis, dorso 

 fusccscentibus, ad uirumque laius saepo sanguineo-zonaiis, apicc 

 niarginequo airo-sanguincis, carina viridnla; siaminibus 2; siylo 

 bifido ; aclienio obovaio, laieribus comprcsso, apicaio, subiilis- 

 simc puncinlaio, laeic fusco, angulis castaneis. C. bicolor ^or- 

 rey, Caf. of pl. of New-Yorli. (^Jide specim. aufhent. niecum a cel. Gray 

 communic.) Torreya mariiima liajinesc/ue in Journ. de phys. 89. 

 105. — Amorica borealis. 2|i — In speciminibus mecum ab amic. 

 Boott communicaiis folia cnlmo l)roviora, umbolla 3-4-radiata, 

 radii 2-3, elongaii, apicc 6-13-siacliyi ibiquc sacpc trifidi, unus 

 Lrcvissimus, subnullus. 



11. C. GRAMMICUS Kunze in Porppis;. CoU. Chil. 3. 18. Rc- 

 j)ons ; <ulmis brovibus, iriangularibus, glabris; foliis culnio vix 

 longioribus, planis, laiiusculis, glabriusculis ; umbella pluriradiata, 



