8 © APPENDIX. 
POLYPODIUM. Part L Page 32. 
POLYPODIUM rhceticum. 
Sp, PL 1552. Ray Syn* 124. Pluk. Phyt, Tab, 89. Fig. 4.^ 
r A B. XLF, 
RHETIAN POLYPODY. 
T he root of this plant, I have not had an opportuny of ob~ 
ferving. 
In the fpecimen before me, the height of the frons^ or firft leaf, is 
about twelve inches; the rib is of a pale colour, furrowed on the upper 
iide, covex or rounded on the under ; is more ftout, and much lefs brittle 
than that of the Polypodium fragile. 
The fecond leaves are about twelve pairs, placed alternately, very re¬ 
mote below, growing gradually nearer each other upwards, but are 
diftindt quite to the top ; they are placed at an acute angle with the 
middle rib. 
The third leaves are divided, down to the nerve, into about three 
pairs of diftindl lobes, of an oval figure, fharply and diftindtly ferrated 
about the edges. 
Thofe third leaves which grow on the upper fide of the rib of the 
fecond leaf, are larger than thofe which grow on the lower ; by which 
charadter alone the fpecies is at once diftinguiflied from the Polypodium 
fragile, with fome varieties of which it has been confounded. 
The inequality of fize in the upper and lower third leaves, is mofl: 
obvious in the firft pair j for in fome of the upper pairs, the triple di- 
vifion 
