378- 96. NAIABACEiE. — 97. CyPEEACB^. 



■wMch are much compressed and green upwards and narrow 

 gradually into the spadix.— In tte sea. P. ? Vll. VIII. E. S. I. 



2. Na'ias Linn. 



1. N. flex'ilis (Rostk.) ; 1. very narrow and very minutely 

 denticulate, sheaths ciliate-denticulate. — Sy. E. B, 1432. — L. 

 temate or opposite, 1-veined, pellucid, remotely denticulate. 

 Ovary solitary, axillary, sessile, oblong. Style short. — Oreg 

 Duff Lake, Eoimdstone, Connemara. A. VHI. I. 



Division III. GLUMIFEEiE. 



(Orders XCVH. and XGVm.) 



Leaves parallel-veined, persistent. Floral envelopes imbri- 

 cate, bractlike. 



Order XCVII. CYPEEACEiE. 



Fl. perfect or unisexual, each from the axil of a scale (or 

 glume) imbricate on a common axis. Perianth 0, or rarely mem- 

 branous. Stam. hypogynous (3 or rarely 2 in our plants), with 

 sometimes a row of bristles or abortive filaments. Anth. erect, 

 entire at the apex. Ovary l-ceUed, 1 ovule at its base, often 

 surrounded by bristles or enclosed in a bottle-shaped perianth. 

 Style simple, trifid or bifid. Embryo enclosed within the base 

 of the albumen. — L. with entire sheaths. 



Tribe L CYPUBUJE. Fl. perfect. GL 2-ranked. Perianth 0. 



1. Ctperus. Spikelets 2-ranked, many-flowered. Gl. of 

 1 valve, many, keeled, nearly all with flowers. 



2. ScHCENTJS. Spikelets 2-ranked, 2 — 4-flowered. G16 — 9; 

 several lower ones smaller, empty. Bristles few or 0. 



Tr. IL SCIRPEJE. Fl. perfect. Gl. imbricate on all sides, 

 Perianth 0. 



* Lowest glumes empty or smaller than the others. 



3. Gladium. Spikelets 1 — 3-flowered. G15or6. Bristles 0. 

 Nut with a thick fleshy coat, tipped with the conical base of 

 the style. 



4. Ehynchospoba. Spikelets few-flowered. Gl. 6 or 7. 

 Bristles about 6. Nut compressed, convex on both sides, 

 crowned with the dilated hose of the style. 



