56 CYPERACEAE. 



8. Rynchospora marisculus Lindl. & Nees; Mart. Fl. Bras. 2^: 142. 1842. 



Eynchospora jubata Liebm. Vidensk. Selsk. Skr. V. 2: 254. 1851. 



Perennial by rootstocks, glabrous. Culm rather slender, 0.5-1 m. long. 

 Leaves 2-5 dm. long, 7 mm. wide or less; corymbs usually several, distant, or 

 the upper ones approximate, dense, the lower slender-stalked, nodding; spike- 

 lets numerous, clustered, narrowly ellipsoid, acute, 5-7 mm. long; scales brown, 

 lanceolate or ovate-lanceolate, acute, from 1 to 3 of them subtending achenes; 

 bristles 6 or 7, longer than the achene, scabrous above, pilose at the base; 

 style 2-cleft at the apex; achene short-stipitate, obovate, transversely undulate, 

 1.5-2 mm. long; tubercle flat-conic, acute, about one-half as long as the achene. 



Moist grounds, New Providence : — Cuba ; Haiti ; Jamaica ; tropical continental 

 America. Lonq Beaked-eush. 



9. MARISCUS (Hall.) Zinn, Cat. Hort. Goett. 79. 1757. 



Perennial leafy sedges, similar to large Binicliosporas, the spikelets oblong 

 or fusiform, few-flowered, variously clustered. Scales imbricated all around, 

 the lower empty, the middle ones mostly subtending imperfect flowers, the 

 upper usually fertile. Perianth none. Stamens 2 or sometimes 3. Style 2-3- 

 cleft, deciduous from the summit of the achene, its branches sometimes 2-3- 

 parted. Achene ovoid to globose, smooth or longitudinally striate. Tubercle 

 none. [Greek, referring to the branched inflorescence of some species.] 

 About 40 species, natives of tropical and temperate regions. Type species: 

 Schoenus Mariscus L. 



1. Mariscus jamaicensis (Crantz) Britton in Britton & Brown, 111. Fl. ed. 2, 

 1:348. 1913. 



Cladium jamaicense Crantz, Inst. 1: 362. 1766. 

 Cladium occidentale Schrad. Fl. Germ. 1: 76. 1806. 



Culm stout, 1.5-3 m. high, obtusely 3-angled. Leaves very long, glabrous, 

 6-20 mm. wide, the margins spinulose-serrulate ; umbels several or numerous, 

 decompound, forming a large panicle; spikelets mostly 2-5 together at the 

 ends of the raylets, narrowly ovoid, acute, 4-5 mm. long; uppermost scale sub- 

 tending a perfect flower; stamens 2; achene ovoid, abruptly sharp-pointed, 

 wrinkled, narrowed to the base, 2 mm. long. 



Marshes, Abaco, South Bimini, Andros and New Providence to Crooked Island! 

 and Inagua : — southern United States ; Bermuda ; Jamaica ; Cuba to Porto Rico ; 

 Guadaloupe to Grenada ; Mexico. Erroneously recorded by C. B. Clarke as Lageno- 

 carpvs guiancnsis Nees, and by Hitchcock as Cladium mariscus (L.) R. Br. Saw 

 Grass. 



10. SCHOENUS L. Sp. PI. 42. 1753. 



Perennial sedges, with stiff, tufted culms, basal, narrow or semiterete 

 leaves, the 1-few-flowered spikelets clustered, capitate or paniculate, the 

 clusters subtended by 1 bract or few. Scales imbricated in 2 series, the lower 

 ones empty the upper subtending flowers. Perianth of 3-6, scabrous or plu- 

 mose bristles. Stamens 3. Style slender, scarcely enlarged at the base, 3- 

 eleft, deciduous. Achene trigonous; tubercle none. [Greek, a rush.] Sixty 

 species or more, mostly natives of the Old World, the following typical. 



