at 
LI 
Lad 
9 
gg 
e 
Ls 
7 
oo 
ud 
pi 
o 
se eee eee 
. Substance thin ; 
350 
23.—POLY PODIUM. 
Key to species. 
Fronds entire 
Fronds pinnatifid or once or more 
pinnate 
Fronds dimorphie, fertile ones under 
6 inches long ose ase Wee 
Fronds not dimorphic ... 
Fronds very coriaceous 
Fronds paper 
Fronds under 4 ‘inches long and under 
es broad 
Fronds more than 4 inches long and 
4 lines broad 
Under side of. fronds closely woolly .. 
nder side of oo covered with 
long soft hair 
re un 2 to 3 ich long, 2 to 3 lines 
Ps 2 inches long, 13 to 2 lines 
bro; 
. Fronds 3 to 4 inches long, 1 to evi line 
broad, tomentum loose 
Fronds 2 to 3 inches longs 2 to 2 lines 
broad, tomentum thick 
. Under surface maktal with cottony o or 
woo entum 
Under i bue not matted with woolly 
hairs 
Stalks sales together with a tuft of 
lanceolate brown scales at the base 
ks distant without scales at the 
all or main veins 
distinc a ia zio 
Substance thick ; all veins obscure 
Sori large in single rows Los bé 
Sori medium, scattered b eee 
E ise iod i to 1 foot long, 1 to 2 inches 
Fronds 3 to 4 inches long, i tol inch 
. Sori a and copious, ‘scattered 
irregularly .. ae es 
Sori large in irregular 1 row 
14. Main veins = ioci ` veinlets 
retic E 
ipe veins not. distinct, veinlets not 
ticulated .. a Di dis 
15. Fidi pinnatifid 
Frond 
8 once or more pinnate .. et 
9. adna 
me 
e" 
pæd 
ce 
jd 
N 
1 
Sia de 
A. 
pæd 
= 
pi O p ë Á ë 
of p p 
X 
e 
rm 
E 
Piera 
5. 
8. 
7. 
6. 
hirtellum. 
. parasiticum. 
. linearifolium. 
. assimile, 
9. 
10. 
calvatum. 
Lingua. 
13. 
iH. 
12 
su per ficiale. 
lineare. 
. rostratum. 
irioides. 
14. 
hemionitideum. 
normale, 
24, 
