204 MONOECIA, TRIANDRIA. 



i 



lix of a siiii^le scale. Corolla none. Fem. Crt- 

 lix also uf 1 scale. Corolla vi ntiicose, nnonope- 

 talous, bT<!< ritate at the apex. Stigmas 2 and 3. 

 *^\t triquetrous, included in the persistent co- 

 rolla, (or litri cuius). 



Grasses with triquetrous culms and carlnated leaves 

 beariug- androg) nous, ruonoicous or rarely dioicous spikes jj 

 of flowers. «! 



§1. Stipm-s mostly 2. 



f Spikes dioicous. 

 Species. 1. C. scirpoidea. 2. steriUs. 

 t t Spikes androgimoiis. 



Spike 1, the svimuit 77iasculi7?e. 



3 cephalfjphora. 4. s(piarrosa. j8.? typhijia. Mich. S. 

 IVilldeiifjvii. 6 poJytricii'Jdes. C microstackt/a. Mich. 7. 

 Frastriana. Bot. Mag. 1391. S. * /ilifolia. Spike simple, 

 subc\linui-!c, acute; fi-uit sub^iobose, orifice entire; scales 

 retuse; leaves filiformiy involute, subulate and squarrose, 

 shorter than the culn). Hab. On ihe dry plains and gra- 

 veily hills of the Missouri, common. Cespitose; scarcely 

 a hand- breadth hii^li. 



Spikes several, xvith the summits masculine. 



9. are^iaria. 10. brotvoides. 11. retrofexa. 12. stipata. 

 13. muncata. 14. Jilu hie nber^ii. \5. tnultiJ)ora. 16. spar- 

 g-anioides. Ij divnlsa. 18. rosea. 19. panicnlata. 

 Spikes several, tvith the summits feminine. 

 20. leporina. 21. scirpoides. ^2. liigopodioides. 23. ovalis 

 24. scoparia. 25. C7irta. 26. remota. 27 . festucacea. 

 t tit Spikes of distinct sexes. 



J^Iale spike often solitary, the others feminine or partly 



andrngynojis. 



28. saxatilis. 29. ccespitosa. 30. crinita. 31. acuta. 



§ II. Siigmas 3. 

 I Spikes androgynous, ivith the summits masculine. 

 32. peduncidata. 33 ovuta. 



ff Terminal spikes male, the rest androgynous. 

 34. virescens. 35. hirs.ta. 36. Buxbaumii. 37- trichocarpc. 

 1 1 1 Spikes of distinct sexes. 

 Male spike solitary, female oiies sessile or -ufith the 

 peduncles included. 



