70 
FELICES 
BRITANNIC^. 
E QJJ I S E T U M hyemale. 
Sp, PL 1517* F^o, Angl. 448. Scot, 650. Cant, 385, Ray Syn, 
131. Hall, Hiji, 1679. Ger, Em. 1113. Park. 1207. 
A B, XXXIX. 
ROUGH HORSETAIL. 
T he root is black, hard, tough, jointed, creeping, and emitting 
black, tough, hard fibres from the joints. 
I ' 
The fertile (hoots, at their firfl; appearance, are clubbed at the top, 
by reafon of the flower fpike, which is wrapped up in the uppermoft 
vagina. 
This uppermoft vagina is divided, at the margin, in twelve or four¬ 
teen pointed dents or fegments j whereas all the other vaginae terminate 
in very (hort, blunt, black dents. 
The (hields, in the flower fpike, are clofely thruft together, and 
black at firft; when the flowers are blown, the feminal valves are white, 
and difeharge a bluilh foft powder. 
The full grown ftem is about twenty-four inches high, confifting of 
nine or ten joints, the remoteft of them about three inches afunder ; and 
each 
