Ord 2.] TRIANDRIA DIGYNIA. 9 



** Fl. inferior, chaffy. Seed 1. 



22. SCHceMUS. Cor. 0. Spike of very few flowers. Glumes 



2-ranked, with many smaller, empty, external ones. Style 

 simple at the base, deciduous. — N.O. Cyperace^e. 



23. RHYNCHoSPORA. Cor. 0. Spike of very few flowers. 



Gl. imbricated all round, with many smaller, empty, external 

 ones. Seed beaked with the dilated, hardened, permanent 

 base of the style N.O. Cyperace^e. 



25. SClRPUS. Cor. 0. Gl. imbricated all round, uniform, concave, 



expanded. Style simple at the base, deciduous. — N.O. 

 Cyperace^e. 



26. ELEoCHARIS. Cor. 0. Gl. imbricated all round, uniform, 



expanded. Seed crowned and articulated with the dilated, 

 hardened base of the style. — N.O. Cyperace^e. 



27. ERIoPHORUM. Cor. 0. GL imbricated all round, uniform, 



expanded. Seed subtended by numerous very long hairs 



N.O. Cyperace^e. 



24. CYPeRUS. Cor. 0. Gl. imbricated, 2-ranked, uniform. 



compressed. Style simple at the base, decid. Seed naked 

 at the base. — N.O. Cyperace^e. 



28. NARDUS. Cor. a glume of 2 valves. Cal. 0.— N.O. Gra- 



mine^e. 



Some Junci. 



Order II. DIGYNIA. Styles 2. 

 True Grasses. N.O. Gramineje. 

 * Fl. dispersed. Cal. of 2 — 3 valves, with a solitary floret. 



31. ALOPECuRUS. Cal. of 2 valves. Cor. of 1 valve ; simple 



at the summit ; awned at the base. Styles combined. 



32. KNA.PPIA. Cal. of 2 valves. Cor. of 2 unequal, very hairy, 



awnless valves. 

 30. PHLeUM. Cal. of 2 close, parallel, pointed valves, concealing 

 the cor. of 2 awnless valves. Seed loose. 



29. PHa'LARIS. Cal. of 2 close, parallel valves, concealing the 



double cor. of 3 — 4 valves ; 2 innermost downy, subsequently 

 hardened, investing the seed. 



33. POLYPoGON. Cal. of 2 valves, awned at the summit, 



concealing the cor. of 2 valves ; the outermost with a 

 terminal awn. Seed loose. 



34. MILIUM. Cal. of 2 close, tumid valves, inclosing the cor. of 



2 valves. Seed coated with the hardened corolla. 



35. AGRoSTlS. Cal. of 2 acute valves, shorter than the cor. which 



is unchanged, membranous, tufted with hairs at the base. 

 Seed loose. 



36. CyNODON. Cal. of 2 lanceolate, acute, equal, spreading 



valves, shorter than the cor. of 2 compressed, very unequal 

 valves. Seed coated with the hardened corolla. 

 b 2 



