174 87. CYPERACEvE. 



2. Z. NAN A, Roth. Dwarf Grass-wrack. Much smaller than 

 the last. Le. narrow, short, 1- veined. Spadix short, few-flowered, 

 with a transverse band to each ovary. Fruit smooth. 



" Between Fairlie and Hunterston Point, covering hundreds of acres," Dr. W. 

 Arnott. On the opposite shores of Cunibrae not so common. (E) P. 4 8. 



Sub-Class 2. GLUMACE2E. 



Ord. 87. CYPERACE^E. Flowers perfect or unisexual, enclosed 

 in the axil of a bract or glume, arranged in spikelets. Perianth 

 none or replaced by scales or bristles. Stamens 3, seldom 2. Style 

 deeply divided into 2 or 3 stigmas. Ovary simple, 1 -celled, 

 lenticular, when the style has 2 stigmas; triangular when it has 3. 

 Stems solid. Leaves with the sheaths closed. 



GRAMINE.E. See Order 88. 



GENERA OF CYPERACE2E. 



A. Flowers perfect. 



1. SCHCENUS. Spikelet 1 4-flowered. Glumes 6 9, lower ones 



empty. Style 3-cleft. Spikelets sessile, in compact terminal 

 heads. 



2. RHYNCHOSPORA. Spikelets few-flowered. Glumes 6 7, im- 



bricated on all sides. Bristles 10, or sometimes 12. Nut 

 compressed. 



3. BLYSMUS. Spikelets on a zigzag rachis, closely arranged in 2 



rows, with bracts. Glumes imbricated on all sides. Bristles 

 3_6. Nut plano-convex. 



4. ELEOCHARIS. Spikelets solitary, terminal, many-flowered. 



One or two of the lowest glumes empty, forming bracts. 

 Nut crowned with the broad base of the style. Bristles 3 6. 



5. ISOLEPIS. Spikelets many-flowered, solitary, or clustered. 



Glumes closely imbricated on all sides. Style deciduous. 

 Bristles none. 



6. SCIRPUS. Spikelets solitary or fascicled. Glumes imbricated 



all round, equal, or the lowest larger, nearly all fertile. Bristles 

 about 6, sometimes with recurved teeth. Style deciduous. 



7. ERIOPHORUM. Spikelets many -flowered. Glumes imbricated 



all round. Bristles becoming long and silky. Nut triquetrous. 



B. Flowers imperfect. 



8. CAREX. Flowers unisexual, on the same or on different spike- 



lets. Glumes imbricated on all sides of a many-flowered 

 spikelet. Achene or nut enclosed in the urceolate perigynium, 

 the style protruding at the top. 



