78 



TRIANDRIA MONOGYNIA 



obo- I ovate 



seed 



obovate 



E 



pi 



me ovata; semin 

 vato, compresso. 



Sp. pi. L p. 95. Pursh, 1. p. 55 ? .Walt. p. 70. Clajton. 



Stem erect, 8—18 inches high, glabrous, inflated, leaf : i 

 cescent sheath about 1 inch long clothing the base of the stem, 

 verj obtuse, sometimes nearly globose, Glumes round, coriaceous, 

 the midrib at first green, then with tlie sides rufous, margins mem. 

 branous. Tubercle compressed, ovate, equalling, or lon-er than the 



germ, smaller than the mature seed. Bristles 6, as lon«- as the glume?, 

 scabrous. ' a a ^ 



Grovvs in bo-s and damp soils. Fonnd in abundance in spots oc- 

 casionally overflowed .vith salt water. 



Flowers through the summer. 



Eound-headed Scirpus. 



8. TUBERCITLATUS. 



S.culmoteretj, Striate, 

 glumis obtusissimis, laxe 

 appressis ; semirie sub- 

 triquetro, tuberculo 

 gittato seipso majore, 

 ronato. 



Mich 



sa- 



Stem columnar, j 

 glumes very obtuse 

 ly appressed ; seed 

 what 3 anded ; 



tubercle 



sagittate, larger than 

 seed. 



stem about 12 inches high, sheathed at base with one or two mem- 

 branous marcescent scales, 1-2 inches long. £nfAe ovate -lanceolate. 

 SnToV'^ A^ round, with the margin scaHous,\uidrib green. St^' 



feathered '"^''' ^' ^' ^«"g ^^ ^^'^ ^^^^^<^^^> S'^"*^"^''' 



Grows in damp and wet soils. 

 * lowers July— August. 



9. QUADR 



S culmo 



acute quad 



Mich 



& 



laterihus 



no 



J 



pica cilyndi 



Pl 



Stem 



ly four 



o 



glumis obtusissim 



Mid 



Pursh, 1. p. 53, 



led, three sides 

 one wider, flat 

 cylindrical ; alumes 

 obtuse. 



? 



ipike 



o 



Root creeping perennial. Stem erect, 1—2 feet h5-h dabrou^- 



SLSnou\"'shtZ^ ^ "-"r^^ '" ^''^^ cltd 'A fewith ^ 

 Srbr l-"%th*rw^ interior 3-4 inches long, closed ; tlie e%' 



I ^ inches long, open, marcescent. Spi&\n inch or wore 



Jt 



