t 
INTRODUCTION. xix 
Kquifetum paluflre tenuiffimis longijfimis fetis, Ray Syn, 
P. 131. No, through miftake has been made a 
‘variety of Equifetum Arvenfe, 
There is another variety of Equifetum paluflre,^ in which 
the branches or fecond leaves are fertile, producing fmall 
flower Ipikes on their fummits. This variety, in moft in- 
ftances where I have had an opportunity of obferving it, has 
d^een occafioned by that the primary flower fpikes, of fuch 
fhoots as produced fecondary ones, had been bit off or other- 
wife deftroyed ; this variety is the 
Equifetum paluflre minus polyflachion, Ray Syn, P, 131, 
No, 7. Ti'ab, 5. Fig, 3. 
When the Equifetum limofum grows in the mud at the 
bottom of ftill ponds or rivers, and is in a luxuriant ftate, 
it commonly produces plenty of branches or fecond leaves ; 
in which ftate it makes the 
Equifetum foliis nudum ramofum, Ray Syn, 132. No, 12. 
There is a variety of Equifetum hyemale^ in which the 
leaves are rufti-like, quite Ample, and deftitute of branches ; 
in this ftate it makes the ‘ 
Equifetum foliis nudum non ramofum fue junceum, Ray 
Syn, 131. No, 11, 
e The 
I 
