TRI ANURIA iViaNOGYNtA* 71 



r 



P 



belluls? fadiis alternis. ] rally wanting; partial um- 

 Vahl.Enuni.pUs.p. 368. | bels with alienmte rays^ 



Sp. pi. I. p. 2SI, 

 Mich. !• p. 28. 

 Pursh, 1. p. 52. 



Stem 2 — 3 feet high, S angled. Leaves long, ratlier delicate, with 

 minute serratures along the margin, Involucrum -vvitl^ two or three 

 leaves longer than the umbel. Rays of the umbel 5 or more. . Spike^ 

 lets scattered near the summit of the rays, linejir, subulate, many 

 flowered (14 — 24). F^flZt-^'s slightly mucronate. 



As thCfSpikelets seem scattered along the common^ih^Ye is no S7nalL 

 involucrum, and it is often a minute setaceous leaf. 



Grows in swamps and ditches. 



Flowers August — October. 



r 



J 



20. Tetragonus. E. 



C. spicis oblorigis, cy- j Spikes oblong, cyUn- 

 lintlricis ; spiculis subte- 1 drical ; spikelets soriie- 



tragonis, paucifloris ; in- 

 volucro longissimo j in- 

 volucellis 0. 



what 4 angled, few flow- 

 ered : small involucrum 



wantnig. 



stem 2 



\ 



umbel a little sea 



brotts. leaves 12—18 inches long, 3 lines wide, channelled, the mar- 

 gins and midrib serrulate. ^- - - 



* « -to 



about 



inch long at the extremity of the rays, several sessile in the centre 

 oftheuipbel. Spikes 5—5 fioweicd. From the width of the rachis 

 the spike is distinctly 4 angled. Glumes compressed, nerved, slight- 

 ly mucronate. Stamens 3. i>tyle 2 cleft. Seed oblonsr, 3 anoTed, 

 Brutles 0. ^ ° 



Fuund on Edings' Island j also near St, Mary's, by Dr. Baldwin- 

 Rare to mp- '' ' •' 



I 



21. Flavicojus ? Mich. 



C. culmo triquetro ; I Stem 3 angled ; urn- 

 umbellis compositis ; spi- bcls compound ; spike- 

 ciilis lineal i-lanceolatis ; lets linear-lanceolate ; 

 gmmis obtusis, subemar- j glumes obtuse, some- 

 g^natis. E. | what emarginate. 



Mich. 1. p. 27. Pursh, 1. p. 53 ? 



Plant very dabrous. Stem 1—3 feet high, 3 angled, with i}yt an- 

 gles obtuse. Leaves linear-lanceolate, channelled, nearly as long a& 

 roe stem, shd.tiy serrulate near the summit; a little glaucous under- 



1 



olucrum 



ua lue keel and margins green. Spikes 10—12 flowered, expand- 



