GUIDE. 
FRONDS FEATHER-SHAPED. 
Fruit -dots round, f 
C t Z er JZt S Polypodium. 
on or at the ends \ 
of veins } 
Fruit -dots linear, f 
parallel to the -j Woodwardia. 
midvein ( 
Frond 4-10 inches, f 
smooth, fruit-dots -j P. vulgare, L. 
large • ( 
2-6 in., scaly, fruit- ( 
dots small, . near •( P. polypodioides, L. 
margin (. 
Fertile and sterile 
fronds alike. 
Fronds unlike. 
-j W. Virginica, (L.) Sm. 
areolata, L. 
Fruit-dots linear. 
Oblique to the 
Asplenium . . . 
midrib. 
Evergreen, pinnatifid 
Evergreen, v e 
small. . . 
• y -| 
Pinnae more' or less ( 
ear-shaped at base. ( 
Stipe black. 
Frond broader; small 
Fruit -dots cup- 1 
shaped, ending ■< Very thin, small fern. . 
with a bristle.... ( 
Tall, 2-4 ft. . . . | 
Fruit-dots curved. . 
Trichomanes. . . 
W. 
A. pinnatifidum, Nutt. 
A. ebenoides, R. R. Scott 
A. viride, Huds. . 
A. trichomanes, L. 
var. incisum, Moore 
A. parvulum, M. & G. 
A. platyneuron, (L.) O. 
A. Bradleyi, D.C.E. 
A. fontanum, (L.)Bh. . 
A. montanum, Willd. . 
A. ruta-muraria, L. 
A. angustifolium, Mx. 
A. thelypteroides, Mx. 
A. filix-foemina, Bh. 
Fruit-dots round, on 
the veins 
Small ferns. Indusium 
delicate, divided into 
segments 
Woodsia. 
'Fruit-dots round, small 
covering none; fronds 
triangular 
Fruit -dots round, 
with covering, 
(rarely without) on 
the back, rarely at 
the end of the 
veins 
it 
Phegopteris. 
T. radicans, Swtz. 
W. ilvensis, L. 
W. alpina, Bolt. . 
W. glabella, R. Br. 
W. obtusa, Spreng. 
W. scopulina, D. C. E. 
W. Oregana, D. C. E. . 
P. hexagonoptera. Fee 
P. phegopteris, (L.) Unde. 
P. dryopteris. Fee 
P. dryopteris, Robertianum Dav. 34 
Fronds large; fruit-dots 
flat, round or kidney- 
shaped, fixed at the 
centre, opening at the 
margin 
Dryopteris. 
Fruit-dots roundish; deli- ( 
cate ferns, 2-3 pinnate. ( 
Covering (indusium) ob- 
scure ; fruit - bearing 
and non-fruiting frond - 
unlike; fertile, narrow, 
fruit berry-like. 
near the margin 
dish, ( 
in... \ 
Fruit-dots roundish, j Frond thin, pale green, j 
finely cut. 
Cystopteris. 
Onoclea. 
Dicksonia. 
Leaves large, unlike; f Fertile frond contracted, 
sporangia naked, I with the large fruit- 
globular, opening ^ dots Qn s narrow 
i°£S?»d!M l 
OSMUNDA. 
PAGE 
. I 
14 
D. 
D. 
D. 
D. 
D. 
D. 
D. 
D. 
D. 
D. 
D. 
D. 
( t 
D. 
D. 
C. bulbifera, Bernh. 
C. fragilis, Bernh. 
O. sensibilis, L. 
O. struthiopteris, L. 
D. punctilobula, (Mx.) Gray 
O. regalis, L. 
O. cinnamomea, L. 
var. frondosa 
O. Claytoniana, L. 
15 
16 
17 
21 
18 
20 
19 
18 
26 
25 
24 
23 
22 
27 
28 
64 
57 
58 
59 
62 
60 
61 
32 
3i 
33 
thelypteris (L.), A. Gray 
Noveboracense, (L.) Gray 
simulata, Dav. 
fragrans, (L.) Sch. . 
spinuolosa, L. 
var. intermedia, Willd. 
var. dilatata, Hoffm. . 
Bootii, (Tuckm.) U. 
cristata, L. 
var. Clintoniana, (Eat.) U. . 
cristata X marginalis, Dav. 
Goldieana, Hook. . 
filix-mas, L. 
marginalis, L. . 
acrostichoides, Mx. 
“ var. incisum, G. . 
lonchitis, L. . . 
aculeata, Braunii,(Spen,)Unde. 
40 
39 
4 1 
42 
49 
50 
51 
52 
43 
44 
45 
46 
47 
48 
35 
36 
37 
38 
53 
54 
55 
56 
63 
67 
69 
70 
68 
