3«4 CRYPTGGAMIA. FILICES. Equisetum. 
arvense. E. .caulibus sterilibus undiqiie ramosis ; ra- 
mis scabriusculis : tructificantibus simplici- 
bus, vaginis distantibus late incisis. 
E. Fertile stalk leafless : barren stem leafy^ 
lying down', leaves in whirls. 
CORN HORSE-TAIL. Moist cornfields. Newark; 
Southwell. P. March, April. 
palustre. E. caulibus fructificantibus angulatis ramo¬ 
sis : ramis simpljcibus erectis scabriuscu¬ 
lis. 
E. Stem angular : leaves unbranched. 
MARSH HORSE-TAIL. Marshy and watery places. 
Newark; Southwell; Nottingham. P. June, July. 
jiuvia-.Yj. caulibus sterilibus ramosis : ramis scabri- 
tile. usculis numerosissimis; fructificantibus 
simpiicibus, vaginis approximatis setaceo- 
multifidis. 
E. ‘Stem scored : leaves generally unbranched. 
GREAT WATER HORSE-TAIT. Marshy and wa¬ 
tery places, sides of rivers, ditches, poids, and lakes. 
P. May, June. 
limosum. E. caule nudiusculo ramisque laevibus, 
amento terminali. 
E. Stem frequently naked^ smooth. 
0 
V SMOOTH n aked HORSE-TAIL. In beds of rher», 
near the banks ; common. 1*. May. 
hyemale. E. caule nudo scaberrimo basi subramaso, 
vaginis albidis basi apice que nigrrs, amen¬ 
to terminali. 
E Stem nakedy roughs somewhat branched at 
the basts 
