CTPEETTS. 379 



** Lowest glume empty or larger than the others, sometimes aU 

 fertile. 



t Bristles scarcely equalling the glume or wanting. 



6. EiEOCHAHis. One or 2 lowest gl. broader, empty. Bris- 

 tles 3 — 6. Nut compressed, crowned with the persistent 

 dilated base of the style. 



6. SciRPus. Glumes nearly equal ; or 1 or 2 lowest broader, 

 empty. Bristles about 6 or 0. Nut plane-convex or tri- 

 gonous ; hose of the style filiform, not diluted. 



7. Bltsmus. Two lowest gl. broader, and empty. SrisHea 

 3 — 6. Nut plane-convex, tipped ■\vith the not dilated base 

 of the style. Spikdets with bracts, dtemate, forming a close 

 distichous cormpound terminal spike. 



tt Bristles ultimately much exceeding the glumes. 



8. Emophoiium. Glumes nearly equal, lowest sometimea 

 empty. Bristles ultimately silky. Nut trigonous. 



Tr. m. ELTKE.S:. Fl. unisexual. Perianth or formed of 

 1 or 2 scales. 



9. KoBEESi\. Spikes close together. Lower fl. fem., peri- 

 anth of 1 scale enclosing the gennen and covered by the 

 glume. Upper fl. male, without any perianth. 



Tr. IV. CARIOUS. Fl. imisexual. Nut completely enclosed 

 in the bottle-shaped perianth. 



10. Cabex. n. in imbricate spikes, each covered by a 

 glume. Female fl. with a single bottle-shaped persistent 

 perianth, 1 style and 2 — 3 stigmas. Male fl. of 3 stam., 

 without a perianth. 



Tribe I. Cypereee. 



1. Ctpe'rtjs Linn. GaJingale. 



1. C. lon'gus (L.) ; spikelets linear-lanceolate in twice-com- 

 pound umbels, peduncles of partial umbels erect unequal, stig- 

 mas 3, creeping.— -£'. £. 1309. St. 52. 10.— St. triangular, 2—3 

 feet high. Umbel very large, lax, imequal, its base with 2 or 

 3 long leaves. Gliunes brownish red^with green keels and pale 

 margms. — South of England, rare. P. "VIII. IX. E. 



2. C.fus'ctis (L.) ; spikelets linear-lanceolate in small round- 

 ish heads at the extremities of the branches, gl. spreading, stig- 



