CL. III.] TRIANDRIA. 59 



spike imbricated all round. Husks none. Style simple at the base, 

 deciduous. 



10. ELEO'CHARIS. Chaff-scales single, uniform, arranged in a spike 



imbricated all round. Husks none. Style enlarged at the base, 

 permanent. 



11. ERIO'PHORUM. Chaff-scales single, uniform, arranged in a 



spike imbricated all round. Husks none. Seed with numerous 

 very long hairs arising from the base. 



8. CYPE'RUS. Chaff-scales single, uniform, in two rows, arranged 

 in an imbricated spike. Husks none. Seed naked at the base. 



12. NA'RDUS. Chaff-scales two. Husks none. 



(Some species of Juncus.) 



Order II. DIGYNIA. Two Pistils. 



* Flowers in panicles. Calyx of two or three chaff-scales, 



containing one flower. 



15. ALOPECU'RUS. Chaff-scales two, nearly equal, acute. Husk 



one, awned at the base. 



16. KNA'PPIA. Chaff-scales two, nearly equal, abrupt. Husks two, 



unequal, awnless. 



14. PHLE'UM. Chaff-scales two, nearly equal, pointed. Husks two, 

 concealed, awnless. Seed loose. 



13. PHA'LARIS. Chaff-scales two, unequal, Husks three or four, 



the two innermost downy. Seed invested by the hardened internal 

 husks. 



17. POLYPO'GON. Chaff-scales two, equal, awned at the summit. 



Husks two, concealed, the outermost with a terminal awn. Seed 

 loose. 



18. Ml'LIUM. Chaff-scales two, unequal, tumid. Husks two, concealed. 



Seed invested by the hardened husks. 



19. AGRO'STIS. Chaff-scales two, acute, awnless. Husks two, longer 



than the chaff-scales, membranous, tufted with hairs at the base. 

 Seed loose. 



20. CY'NODON. Chaff-scales two, acute, lance-shaped, equal. Husks 



two, very unequal, compressed. Seed invested by the hardened 



husks. 

 34. SPARTI'NA. Chaff-scales two, lance-shaped, unequal. Husks 



two, unequal, compressed. Seed loose. 

 38. LAGU'RUS. Chaff-scales two, unequal, fringed, with terminal 



feathery awns. Husks two, unequal, the outer with three awns. 



21. DIGITA'RIA. Chaff-scales two or three, very unequal, awnless. 



Husks two, unequal, awnless. Seed invested by the hardened 

 husks. 



(Some species of Arundo. Melica unijiora.) 



** Flowers in panicles. Calyx of two chaff-scales, containing 

 two or three flowers. 



23. AI'RA. Chaff-scales two, unequal. Flowers two. Husks two, the 

 outer awned above the base. Seed loose in the husks. 



26. ME'LICA. Chaff'-scales two, unequal, awnless. Flowers two, to- 

 gether with the rudiments of a third. Husks two, awnless. Seed 

 invested by the hardened husks. 



25. HO'LCUS. Chaff-scales two, unequal. Flowers two, one of then' 



