appendix. 8i 
vifion ceafes, and the fecond leaf terminates in diftindt, ftiarply ferrated 
lobes. 
The feed-veflels are placed in round dots, on the under fide of the 
lobes; two or three on the fmaller, five or fix on the larger ; they are 
of a brown colour, and diftindt. The whole plant is larger, firmer, 
more robuft, and of a ftronger green than the Polypodium fragile. 
The Polypodium fragile in fome of its ftates, fee part i, page 51, 
fo nearly refembles the Polypodium rhoeticum, that others, as well as 
myfelf, have been deceived by it. Hallar, Wais, &c. feem to doubt its 
exiftence; and it appears from their defcriptions, that they had not ex¬ 
amined the true Polypodium rhoeticum ; no more had I, otherwife fo 
obvious a charadler as the inequality of fize in the third leaves, on the 
oppofite fides of the rib of the fecond leaf, could not have been difre- 
garded. 
r 
In my plate of varieties. Part i. Tab, 2, thofe of the Polypodium 
fragile not being fufiiciently exprefled, at the inftance of feveral friends, 
I have added TAB, XL,VI ; in which I have carefully copied thefe 
varieties. For on the two ftems given in the plate, by varying the fecond 
leaves, as I found them in feparate fpecimens, I have reprefented all thofe 
varieties which have been fuppofed moft to refemble the Poly podium 
rhoeticum. 
Specimens of Polypodium rhoeticum and Acroftichum thelypteris 
were fent me by my friend Dickfon, author of the Plantarum Crypto- 
gamicarum Britannic^ ; the firft he gathered in Scotland^ the laft, he in¬ 
forms me, grows in plenty about Norwich^ 
ERRATA IN THE FIRST PART. 
Introduction, p. 6 , 1 . 17,/or fupine r. prone. — P 16, 1,3. r. Anglica.— —J« the Book, p. 5, 1 . 3. r. and when the feed's are 
difcharged.—P.40, 1 . z, 3, erafe Ger. Em. & Park.—P.41, 1 . 1, tab. —P. 41, I. 3, erafe from this, and the reft of the fen- 
ience. — P. 51, 1 . 1 5, erafe this is, and the reft of the fenUnte\--fame Uney after delicate, add tab, -^’Throughout the Book, for 
Polipodium r. Polypodium. 
