200 MONOCOTYLODE^lOUS. 



1). CAKICINiE. 



Genus II CARKX. 



Flowers iiioncEcioiis, rarely dicDcioiis. Flowers irnhricate, 

 ainentacoous. Glume 1, 1-fl »\\e;e(l. Pa/ccB of the sterile 

 florets none, of tlie rcrtilc ones venlricosc, persistent, enclo- 

 sing the nut. 



A. Iiiflorescence diccciovs. 



1 C Sterilis Stem obtusely angled, slichtly scabrou8. Leav^t linear, 



shentliirii;. Sjiiket 3-6. Fruil ovaie-ucuiniimtc, 3-angled, coniprctiscd, apex 

 recurved bicuspidaie. 



% May. Marshes. 8-12 in. 



B. Injloresrcncc monceriouf. 

 (a) Spikes androgynouf, solitanj, uith the summit sterile. 

 t C Frasebi. Siem erect. I^ux-rs broad, lanceolate, radicle, undulate, 

 crenulaie. S^iAe simple, ovate Fruit entire at the apex, longer than the 

 ^unit;. 



% April. Mountains. 



3 C WjLLDENOwii. Stem triangular, erect. Leaves linear, longer than 

 the stem. 5S/'«Ae terininni, simple, ovate ; sterile and fertik floins abou' equal 

 in number, about 6. FruU ovale, nearly lereie, bcalitd. Glume* ovate, the 

 inferior oms lonij and r.»liareous, acuminate. 



% May— June. Dry woods. 6-S in. 



(6) Spike solitaru uilh the fummit fertile. 



4 C Sqdarrosa. Stem trianjrular, scabrous along the margin. Leaves 

 narrow, ulabrous, with s^cabrous margins, i^pikex niostly simpk-, sometimes 

 2-3 cylmdriral, obloim, very thick. Glumes ul the base lanc<t.|ate, slighily 

 colored, ihose of the summit. Fruit imbricate, emwih, bi-deiilate, longer 

 than tlu> uluine. 



%. iMay— June. Dogs. 1-2 ft. 



(r) Spikes stvcral, collected into a head. 



5 C CEpnA^oriioRA. Stem 3angled, scabrous along the margins, leafy at 

 the base. Leaves lunar, long Spikes collected into an eiipUcal head. 

 Glumes ovntf^, niiicronatt. Fruit ova'e, scabrous on the maryi.i. 



% May — June. OaU woods, common. 2-3 ft. 



(f/) Spikes distinct, not in a head, the summit sterile, stifrmas 2. 

 6C DROMoiDts. Stem 3-anglfd. sc.brous along the niar£rins, slender. 

 leaves linear, slightly sra!)r<>us. Flowers in numerous linciir spikes, the 

 spikes alternate, erect. f/'/wmM lancfolale, mucronuie. /'u/tce ovule. Fruit 

 •cabrou.s bifid, longer, than the trlumc. 

 % April. Damp soils. 12-18 in. 



7 C Retroflexa. Stem slicluly anqled, slender. leaves nearly fihform, 

 scabrous nloiir the mari,nM. Spikes l-fi. Glnmes uvntc, shorter than the po- 

 lee. Fruit ovate-Ianre..laIe. b)-(l(Mitatc, as long us Ujc jjluincs- 



% .May. Dry soils. 10-12 in. 



8 C Rosea. Sum alrnfler. hliu'htlv anyled. leaves linear. Spikes 4-«, 

 remote, ilie lowe!«t onu with a seiacr«ius bract. /Vutl ovale, 2-toothed, cili- 

 ale. Glumex ova e, nearly as lonij ns the paleffi. 



% May. Damp woods. 10-12 in. 



9 il Muilt.rNDKR'iii. Stem erect, iinL'nlar, stout, scabrous at the summit 

 L/tavri linear, sheaihmg llie stem. S^^iAr* about 0. ovate, c rowdcd at the 

 summit of the stem. Crartial l-aves yetaceons, longc r than tiic spike*. 

 GUtmea nmrronnte, longer than the palcoB. Palea 2-cleU at the summit. 



% May. Shady wooda. 1-2 ft. 



