452 CONTRIBUTIONS FROM THE .NATIONAL HERBARIUM, 



3. Mariscus mutisii II. B. K, Nov. Gen. & Sp. 1: 216, pi. 66. 1815, 

 Cyperufi mutisii Griseb, FL Brit. West Ind. 5G7, 18G4. 

 DiftTRiBrTiox: Tropical parts of America. 

 Costa Rtcan collections: Alaju<4ita, altitude 1,000 meters, Tondaz SS44; Rio 



Tiribi, Tonduz 6947. 



4< Mariscus ehrenbergianus (Bo<^ck].) C. B. Clarke. 

 Cy penis fhrenbcrfjianus BoQckl, l^'mn?ie'^ 36: 391. 1809-70. 

 Cyperiis randuzii [foijdvzii] Boeckl. Allgom. Bot. Zeits(^hr. 2: 17, 1890, slender 



variety excluded. 



Spikes 2 to 6, cylindric, dense, digitate on each rather long ray of the umbel; spike- 

 lets small, oblong, each maturing 1 to 3 tawny greenish nuts; glumes ovate, acute, 

 imbricated in fruit; style S-ftd. 



Distribution: Tropit^al Am(^rica, sparse. 



Costa Ricam collections: Nicoya, Torwii/^; 13743; El Itodeo de Paquita, alti- 

 tude 900 meters, Tonrf/f^ 1621. 



5. Mariscus rufus^ 11. B. K. Nov. Gen. & Sp. 1: 21fi. pL 67. 1815. 



Cyperus ligularis L. Amoen. Acad. 5: 301. 1759. 



Cy perm coriif alius V>oi^<:\\. Linnaea36: 391. 1869-70, in part. 



Di;sTRiBtTiox: Common in tropical Africa and America. 



Costa Rican collections: Sipurio, altitude 150 meters, Tonduz 8728; Pm^to 

 Lunon, ritlier 4213; Boca Banana, Tonduz 9123; Limon, Tonduz 9795; Salinas 

 Bay, TomlMZ 27\2; San Carlos, Toridaz 2m0. 



0. Mariscus manimae (11. B. K.) C. B. Clarke. 



Cyperus vmnimaelL B. K. Nov. Gen. & Sp. 1: 209. 1815 



Cyperus spcciabilis coarctatus Boet'kl. Linnaea 35: G0(>. 1867-68. in part. 



Stolon thickened into a rhizome 3 to 4 nun. in diameter; spikes 2 to 4, rather long- 

 peduncled, forming a simple umbel, ovoid or cylindric, den^e, tawny yellow green; 

 spikelets oblong, maturing 3 to 7 nuts; glumes ovate, (tbtuse, striate, at length 

 ohlifpiely sprea.<ling, not cadneous; style 3-iid; nut ellipsoid, trigonous, two-thirds 

 to three-fourths as long as the glume. 



Distriri^tion: Mexico. 



6a. Mariscus manimae divergens (H. B. K.) C. B. Clarke. 

 Cyprrvs diver fjens 11. B. K. Nov. Gen. & Sp. 1: 208. 1815. 



Cyprrus hicrpa ^Qi"^^ Linnaea 19: (i97. 1847. 

 Cyperiis asperrimus ^^i'hu^. Dansk. Vi<L Selsk. Skr. 2: 30. 1849. 

 Spikes sessile or shorl-peduncled; summit of stem, togelhcn* with the l»racts and 

 leaves, often d(ms(^ly or sparsely liispid-scabrous, 



DiSTiiiiiUTioN: In Central Amerira (with the Andes at Quito) abiURlant. 



Costa Rican collections: IloffmannMS; Cartage, altitude 1,400 melers, Tonduz 



1075G. 



Spf^cies conunon in Ci'Utral America in many varieties and forms. In my opinion 



the following belong here: 



Gb. Mariscus manimae apiculatus (Liebm.) C. B. Clarke. 

 Cyperus apicalatns Liebm. Dansk. Vid. Selsk. Skr. 2: 32. 1849. 

 Keels of the glumes excurrent. 



6c. Mariscus manimae hartwegianus C. B. Clarke. 



Spikes crowded into a single head; spikelets dark-red, 10 to 12-ilowere<l. 



7. Mariscus jacquinii 11. B. K. Nov. G(^n. & Sp. 1: 216. ISlo, 

 Carexhrriuaphrodita .Jiicq. Coll. 4:1 174. 1790. 

 Cyperus thyrsijinrus Jungh. Linnaea 4: 24. 1831. 

 Mariscus longiradiaius Liebm. Dansk. Vid. Selsk. Skr. 2: 44. 1849. 



^The specific name ligularis is older and unoccupied.- Foitor. 



