•miANDRlA MONOGTNIA. 7Q 



JS^ 



• 



long, cylindrical. Glumes nearly round, the midrib grfeen, sides 

 ferruginous, the margins Scarious. Filaments 3, very short. Style 

 a little dilated at base, scarcely forming a tubercle. Bristles S^ seta- 

 ceous, longer than tite germ. *^ 



Grows in swamps and Bogs. In rice fields it becomes a very inju- 

 rious intruder, as its thick creeping roots occupy the ground, and per- 

 mit nothing to grow uhere they extend. This is a very different 

 plant from the S. tenuis of Muhl. Cat. 



Flowers April — May. ^ Foiir-angled Sclrpiis, 



10. EqUI8ETOIDE5. E. 



S. spica cylindrica, ter- | Spike cylindrical, ter- 



minal, scales very obtuse ; 

 stems terete, doubly 



minali, squamis obtusi 

 mis ; culmis teretibus 

 duplicato-articulatis. E 



jointed 



stem erect, 18 — 24 inches high, terete, glabrous, slightly roughened 

 oyer the whole surface with small tubercles depressed in the middle, 

 distinctly jointed at intervals of Hor2 inches, with several ob- 

 scure intermediate joints, clothed at base with ^ glabrous sheaths, and 

 terminating in a cylindrical spike an inch long. Scales very obtuse, 

 scarious alon^ the margin, with a purple border just below the mem- 

 branous margins. Sfz/fe 2 cleft, forming at ba^e a slender tubercle 

 nearly the size of the germ. 



This plant, excepting that it wants stipules, bears at first sight se 

 striking a resemblance to the Equisetum liyemalc, that attlie sugges- 

 tion of Dr. Macbride I have derived its name from tins circumstance. 

 With the preceding species it might form a distinct section ; the struc- 

 ture of their spikes and flowers are so peculiar and so exactly alike. 



For specimens of this plant I am indebted to the Rev. Mr. Lewis dc 

 Schweinitz of Salem, North-Carolina, who collected it near Fayette- 

 ville in that state. It was recognized immediately by Dr. Macbride 

 as an inhabitant of St. Johns. It grows on the'eastern edge of the 

 public road, in water, seven or eight rods to the south of Friersori's^ 

 lock, Santee Canal, 



Flowers June. 



% 



4 



** Spicis plurihus, I ** Spikes numerous. 

 a. aphylUs, | a, without leaves. 



11. Bebilis. Mubl. Cat. 



S. ciilmo triquetro, e- I Stem 3 angled, erect ; 

 ^ecto ; spiculis paiicis, | spikes few, aggregate, 

 aggregatis, sessili])us,ter- sessile, terminal ; g:uuics 

 mmalibus ; glumis mem- | membranaceous, nuicro- 

 pianaceis, mucronatis ; nate : involucrum ej 



"ivolucro erecto. E 



I'ursI), 1. p. 55 ? 



ect 



