72 37. Rhynchospora. 9. CYPERACE^. Plend.pJu 



channelled, edge and ridge rough ; sheaths short ; ligula 0, 

 or very short ; spikelets umbelled, axillary, or terminal, 2 or 

 3-flowered; braclecE leaflike, longer than the spikelets. 



1. Rhynchospora alba. White leakrush. 

 Culm rather acute-angled ; leaves vei*y slender, channelled; 



spikelets fascicled; root fibrous. 



Cyperus minor palustris hirsutus, paniculis albis paleaceis, Rati Syn. 



427,6. 



Gramen jiinceuin leucanthemum, Ger. em. 30. 

 Cyperelia ^ 1. No. 1. Micheli N. P. G. 33. 

 Schoenus albus, Lin. S. P. 65. 

 Schcenus setaceus, Thuil. FL Par. 19. 

 Rliynchospora alba, VahlEnum. 2,236. 



Bogs ; perennial ; July and August. 



Cidm fascicled, in tufts, 12 in. high; leaves shorter than 

 the culm, erect; sheath 3~sided, white; ligula very short; 

 spikelet oblong, erect, white, turning brownish ; akenium 

 compressed, acute, white ; stigmata shorter than the style. 



2. Rhynchospora fiisca. Brown leakrush. 

 Culm, blunt-angled ; leaves bristlelike, channelled ; spike- 



lets fascicled ; root creeping. 



Cyperus minor angustifolia palustris capitulis fuscis paleaceis, Raii 



Syn. 427, 6.* 



Cyperella ^ 1, No. 2, Micheli N. P. G. 53. 

 Schoeniis fuscus, Lin. S. P. 1664. 

 Sclicenus albus B, Hudson FL Ang. 16. 

 Rhynchospora alba B, Vahl Enitm. 2, 236. 

 S hoenus setaceus, Thuil. Fl. Paris, 19. 

 Rhynchospora fusca, Rcemer Syst. Veg. 88. 



Turf bogs ; perennial ; August. 



Root hard, throwing up a single culm here and there; culvi 

 almost naked, slender ; leaves very slender ; sheath round ; 

 ligula ; spikelet 3 or 4-flowered, oblong, brown, acute ; 

 akenium roundish, palebrown, shining ; stigmata longer 

 than the style. 



VIII. 39. SCHCENUS. Theophrastus. Bogrusli. 



Spathelle 1, imbricate, 3 or 6 outer small, crowded and 

 empty, flowerbearing 3 or 4, alternate; rachis flexuose; 

 glumelles bristlelike, bristles 3 to 6, smooth, shorter than 

 the glumes; stamens Z', style deciduous, not jointed; stig- 

 viate '■'> ; akenium. 3-sidcd. — Root fibrous, perennial ; leaves 

 all radical, tufted, bristlelike, ridged, planoconvex, shorter 

 than the culm ; sheaths broad, slit lengthways, black, 

 shining; i/oida very short; culm round, not branched, apex 

 thickened; head terminal, ovate; spikelets many; involu' 

 crum 2-valved, valves unequal. 



