CRYPTOGAMIA. MISCELLANEZ. Equisetum. 
Fertile stems appearing before the other; soon decaying. Bar. 
ven stems continuing a long time. Linn. Barrez stems rough, 
RS. 
Stalk from a hand’s breadth to a foot high, cylindrical, smooth, 
jointed, the upper knots farther distant, the lower approachin 
nearer to each other; each joint terminating in a sheath. Shearhs 
furrowed, wider than the stalk, many-cleft; segments spear. 
shaped, tapering toa point. Spike yellowish white, nearly an 
inch long, the base encircled with a membranaceous yellowish 
border. Fructifications in whirls, yellowish, Poticu. Stem 
d 
what shining. such situations score 
Sheaths with 4 teeth corresponding to the angles of the leaves, 
of the same colour with eaves. RD 
sheaths furrowed as the stem, cloven one third of the way down; 
teeth blackish brown at the ends, with very shallow white mem- 
branaceous edges. Leaves, the joints of the upper branches fre- 
quently 3-square, and the joints terminating in 3 teeth; teeth 
° The fertile stems not to be distinguished from those 
of the E. sy/vaticum before the leaves appear, but by observing 
that the sheaths in the E. sy/vaticum. are divided into 12 seg- 
ments, but in this species only into 3 or 4, ; 
Corn horsetail. Moist cornfields, P. March, April. 
E. Stem angular: leaves unbranched. 
Bolt: fl. 35; Barren plant 16. 37-Fl. dan. 1183—Lob. ic. 1. 
795. 1-Ger. em. 1114. 4—Park. 1200. 3-Trag. 694- 
Lon. i. 176. 3-C. B. th. 247, left hand stem—Gars. 258. 
B. fructification—Hedwig. Th. 2. 8. 9. 10. 
Stem smooth. Leaves 6 to 10, furrowed, smooth, with black 
Scales at the base. Lrers. Root black. Stem with fewer an 
short, tipped with black, which distinguishes it from t 
@rvense, Woopw, Barren-leaves reseipble those of E. arvense, 
Vor. III, 
737 
palus’tre. 
