all the four quarters of the globe, tropical as well as temperate, 
which it will be hard to distinguish from it. 
Plate 63. Pigs. 1 and 2. Usual form of JEquisetum (§ iEstivalia) palustre , 
Linn .,—natural size. 3. Portion of a young stem or frond, with branches 
sprouting. 4. Portion of stem, with amentiferous branches. 5. Section of a 
stem. 6. Section of a branch, showing the lacunes :— magnified. 
