430 MONOCOTYLEDONOUS PLANTS. 



Div. III. SCLEREJ5. 

 12. SCLERIA. Linn. 



Monoecious. STKRILE FL. Glumes 2 or 6, many-flower- 

 ed. Palece unarmed. FERTILE FL. Glumes 2 or 6, 1 -flow- 

 ered. Palece none. Stigmas 1 3. Nut coloured, subglo- 

 bose. Monoecia. Triandria. 



1. S. triglo/merata. Mich. : culm erect, acutely triquetrous, scabrous ; 

 leaves broad-linear, subscabrous and a little hairy ; spikes lateral and 

 terminal, fasciculate ; glumes ciliate, mucronate ; nuts smooth and 

 polished. 



HAB. Swamps. Penn. to Car. June, July. I/. Culm 34 

 feet high. Nut large, white and hard. fVhip Grass. 



2. & pauciflora Muni. : stem triquetrous and with the narrow leaves 

 smooth ; spikes lateral and terminal, few-flowered ; the lateral ones 

 pendulous, terminal, fasciculate ; glumes smooth ; seed roughened. 



HAB. Low meadows. Penn. to Car. Aug. 1C. Culm 2 feet 

 high, slender. Lateral spikes 2, on long pendulous peduncles. 



3. & terticillata, Muhl. : stem simple, triquetrous, and with the leaves 

 smooth ; spike glomerate, naked, the clusters alternate, distant ; 

 glumes smooth ; seed globose, mucronate, transversely corrugate. 



HAB. Wet grounds. Penn, to Car. Aug. 21.Culm a foot 

 high, very slender, smooth. Spikes small. Aid small, tubercu- 

 late. 



Div. IV. CARICINJE. 



13. CAREX. Linn. 



Monoecious, (rarely dioecious.) Flowers collected into an 

 imbricated ament. Glume 1-flowered. Corol (or nectary or 

 perianth) ventricose, 1-valved, persistent, enclosing the coria- 

 ceous nut or caryopsis. Monoecia. Triandria. 



OBS. Two excellent Monographs of the North American species of 

 this genus, have been published. The one by Prof. Dewey, is contain- 

 ed in Silliman's Journal, from the 7th to the 14th volumes, inclusive ; 

 the other by Mr. Schweinitz and Dr. Torrey, in the first volume of 

 the Annals of the New- York Lyceum. I shall adopt the latter, with a 

 few additions. 



A . Inflorescence ' dioecious. 



1. C. sterilis ll'illd. : spikes dioecious ; sterile 35 ; fertile about 6, 

 (sometimes androgynous ;) fruit ovate, compressed, triquetrous ; mar- 

 gin ciliate-serrate ; apex recurved and bicuspidate. 



HAB. Marshes. N. Y. Penn. Car. May. 2^. Culm 8 12 

 inches high. Spikes approximate, oblong. 



