VARIEGATED EQUISETUM. 
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mit, and is broken off at a length of four inches ; the second is 
twenty-two inches from the summit, and is six inches in length ; 
the third branch is one inch lower, is nine inches in length, and 
has nineteen joints. The main stem is terminated by a catkin. 
Equisetum variegatum, var. Wilsoni, (natural size). 
The stem of this variety has an average number of ten 
furrows, the ridges between them being broad, as in the usual 
form, but the siliceous particles are far less prominent, so that 
the plant does not partake of that asperity which so eminently 
