SYNOPSIS oy THE GENEKA. 



7. Scha;'nus, [Pagc4C.] Spikckts ouc to ihrcc-flowcrcd. Glumes 



two, ranked, ibc outer ones smaller, barren. Bristles very 

 small, or none. Style jointed, or deciduous. 



8. RflYNcnos'roRA, [Page 40.] 5/?/Ac/t/sfe\v-flowcrcd. Ghimcsoi 



one valve, imbricated on all sides, tbe outer ones smaller, 

 barren. Bristles various in numbci", spiny, and shorter 

 than the glumes. Slijle bifid, dilated at the base, more or 

 less articulated, persistent, and crowning the/;M<7. 



9. SciR'Pus, [Page 48.] Glumes oi one valve, imbricated on all 



sides, the outer ones sometimes barren. Bristles some- 

 times wanting. Style simple, deciduous. Fruit termi- 

 nating in a point. 



10. EiEo'CHARis, [Page 62.] Sp/Ae terminal, solitary. Glumes 



of one valve, imbricated on all sides, mostly all fertile. 

 Bristles four to twelve, finely toothed, rarely absent. Style 

 dilated at the base, and jointed upon the germcn. Stiymns 

 two or three. Fruit lenticular or triangular, crowned by 

 the indurated base of the style. Stem erect, simple, 

 sheathed at the base. 



11. Elio'geton, [Page 54.] [Spike terminal. Glumes nearly 



equal, of one valve, imbricated on all sides, all fertile. 

 Bristles absent. Style deciduous. Fruit tipped with a 

 short point. 



12. Blys'mus, [Page 55.] S^i/v? terminal, compressed. Spikclds 



bracteated, arranged in a distichous manner on a slightly 

 zig-zag rachis. Glumes of one valve, imbricated on all 

 sides, outer ones the largest, barren. Bristles often absent. 

 Fruit compressed, terminated by the tapering persistent 

 style. 



13. EiilorHo'KUM, [Page 50.] Spikes terminal, Rolitary or nu- 



niei'ous. Glumes of one valve, imbricatod on all sidcy, 

 nearly equal. Style deciduous. Sliymas three. Fruit 

 with very long silky hairs springing from the base. 



14. Nau'dus, [Page 61.] Glumes wanting. G/M/H<.7/ts two un- 



equal lanceolate valves, the outer one the largest. 



OuDEU II. DioYNiA. — 2 Pistils. 



* Flowers paniclcd ; {compact, appearing like a spike, or sprcadiuy.) 



•]■ Spikclets singlc-flowcrcd. 

 16. Alopbcu'rus, [Page 74.] Vanidc spiked. Gluma oi iyio 



