204 MONOECIA. TUIANDRIA. 



lix of a sin,^le scale. Corolla none. Fem. Ca- 

 lix also of I scale. Corolla ventricose, monope- 

 talous, bidtntate at the apex. Stigmas 2 and 3. 

 J\nt triquetious, included in the persistent co- 

 rolla, (or utriculus). 



Grasses with triquetrous culms and carinated leaves 

 bearing- androgynous, monoicous or rarely dioicous spikes 

 of flowers. 



§ I. Stiemas mosily 2. 



f Spikes dioicous. 

 Species. 1. C. srirpoulea. 2. sierilis. 

 t t Spikes unilrojrynous. 

 Spike 1, Ihe summit masculine. 

 3 cephalophora. 4. ■fqnarrosa. ^P ti/phijia. Mich. 5. 

 JVilldeiiovii. 6 polytrichoiiJes. C- micrustachya. Mich. 7 

 Fraseriana. Bot. Mag. 1391. 8. * /ilifulia. Spike simple, 

 subcylmdric, acute; tiuit subglobobc , orifice entire; scales 

 retiise; leaves filifbrmly involute, subulate and squarrose, 

 shorter than the culm. Hab. On the dry plains and gra- 

 velly hills of the Missouri, common. Cespitose; scarcely 

 a hand-breadth high. 



■ Spikes several, 'idth the siiminits masculine. 

 9. arenaria. 10 bromoides. 11. retrojiexa. 12. stipata. 

 13. muricata. 14. jlluhleiiberg-ii. 15. muUifora. 16. spar- 

 , gardoiiles. 17. divulsa. 18. rosea. 19. paniculata. 

 Spikes several^ -xvith the summits feminine. 

 20. leporina. '21. scirpoides. '22 hiifopodioides. 23. ovalzs. 

 24. scoparia. 25. curta. 26. remota. 27- festucacea. 

 f tit Spikes of distinct sexes. 

 Ala It spike often solitary, the others feminine or partly 

 androgynous. 



28. saxatilis. 29- caespitosa. 30. crinita. 31. acuta. 



§ II. Stigmas 3. 

 f Spikes androgynous, ivith the summits masculine. 

 32. pedunculata. oo- ovuta. 



ff Terminal spikes male, the rest androgynous . 

 34. virescens. 35. hirs'ita. 36. Bvxbaumii. 37- trichocarpa, 

 fit Spikes of distinct sexes. 

 Male spike solitary, femule ones sessile or ivith the 

 peduncles included. 



