CLASS III. ORDER I., II. 13 



A smaller and more humble plant than the preceding, with 

 very distinct heart shaped leaves. Capsules reflexed, pubescent. 

 — In old woods. — July. — Perennial. 



Class III. TRIANDRTA. Three stamens. 



Order I. MONOGYNIA. One style. 



A. Flowers superior. 



18. Iris. Corolla six parted, the divisions alter- 

 nately reflected; stigmas petal form. 



B. Floivers inferior. 



19. Xyris. Corolla three petalled ; calyx two 

 valved; capsule three celled. 



C. Flowers grassy. 



20. ScHCENus. Corolla none ; calyx of fascicled, 

 chaffy scales; seed one, roundish, 



21. Cyperus. Corolla none ; calyx of chaffy 

 scales imbricate two ways ; seed mostly naked. 



22. SciRPUs. Corolla none ; calyx of chafty scales 

 imbricate every way ; seed mostly naked. 



23. Eriophorum. Corolla none ; calyx of imbri- 

 cate scales ; seed invested with lotJg woolly hair. 



24. Spartina. Calyx two valved, compressed, one 

 valve larger, longer, and carinated; corolla two 

 valved. 



25. Oryzopsis. Calyx two valved, the valves obo- 

 vate, one flowered ; corolla two valved, the outer one 

 awned ; nectary two leaved. 



Order II. DIGYNIA. Ttoo sti/les. 

 A. Flowers scattered, one in each calyx. 



26. Milium. Calyx two valved, the valves ventri- 



2 



