• Fronds sitnplypinnate.
Stalks very short, i to 3 inches long.
17. A . L o n c h it is , Swartz. Fronds 6 to i8 inches long, linear-lanceolate ; pinnæ broadly
lanceolate, falcate, sharply spinulosc-serrate, the lower ones symmetrically triangular and shorter,
the upper ones strongly auricled. — Vol. I., t, xxii., p. 16 1. — Arctic America to Canada, North-
ivestern Michigan, and Utah.
-h- Stalks at least several inches long.
18. A . a c ro sticho id e s, Swartz. Fronds i to 2 feet long, lanceolate from a scarcely
naiTowed base ; pinnæ nearly smooth, oblong-lanceolate, auricled, the lowest ones decurved, the
rest spreading or upwardly falcate, serrulate with bristle-pointed teeth, or seirate, or even incised ;
fertile fronds with the upper pinnæ contracted and covered with sori. — Vol. I., t. xxxiv., p. 257.
— New Bnmswick to Wisconsin, Arkansas, and Alabama.
19. A . mtmituxQ, Kaulf. Fronds i to 5 feet long, lanceolate, slightly naiTOwed at the
base ; pinnæ very many, often cliaffy beneath, usually linear-acuminate, very sharply and often
doubly serrate with incurved aculeate teeth, auricled, all or the upper ones fertile but not contracted;
sori abundant. — Vol, I., t. xxv., p. 187. — British Columbia to California.
» • Fronds pinnate uiith pinnatifidpiiince, or even twice pinnate.
20. A . mo hrioides, Bory. Fronds 4 to 12 inches long, oblong-lanceolate, pinnate;
pimiæ 6 to iS lines long, often imbricated; ovate or ovate-lanceolate, obtuse, pinnately lobcd or
even again pinnate, the serratures not aculeate ; indusia very large and often imbricated. —
Vol. I I ., t. Ix-xx., p. 251. — California.
20. A . acule a tum, Swartz. Fronds i to 2 feet long, oblong-lanceolate, normally bi-pin-
nate, but often only pinnate with deeply pinnatifid pinnæ; pinnæ lanceolate, acute; segments
from rhomboid-oval and confluent to triangular-ovate, auricled and incisely-serrate ; teeth aculeate
or aristatc ; indusia not imbricated. — Vol. II., t. Ixii., p. 123. — New Bmnswick to Pennsylvania,
Lake Superior and California.
§ 3 . Cyr'I'OMIUM. Indusia as in § Folysticlmin. Fronds simply pin nate ; the veinlets
more or less anastomosing in oblique or irregular areoles.
22. A . ju g lan d ifo lium , Kunze. Fronds 4 to 12 inches long, coriaceous, smooth above,
simply pinnate ; pinnæ few, short-stalked, ovate-oblong or broadly lanceolate, obtusely truncate
or sub-cordate at the base, serrate, acute ; sori in two irregular rows between the midrib and the
margin,— Vol. I I., t. l.xxv., p. 2 2 1. — Western Texas.
ig. N E PH RO LE P IS , S chott.
I. N. e x a lta ta , Schott. Fronds 2 to 6 feet long, 2 to 4 inches wide, linear in outline,
simply pinnate ; pinnæ sessile, oblong-linear and slightly falcate, auriculate on the upper side of
the base ; sori sub-marginal ; indusia roundish-reniform or sometimes merely curved. — Vol. II.,
t. Ixiii., p. 129. — Florida.
2 0 . C Y STO P TER IS , B e r n h a r d i .
1. C. f ra g ilis , Bernh. Fronds 6 to 12 inches long, broadly lanceolate, usually bi-pinnate ;
pinnæ oblong-ovate, pointed ; pinnules ovate or oblong, variously toothed or incised. — Vol. IL ,
t. liii., p. 49. — All North America. '
2. C. b ulb ife ra , Bernh. Fronds 6 inches to over 2 feet long, commonly tapering from a
broad base to a long and narrow apex, often bearing bulblels at the base o f the pinnæ or elsewhere,
bupmnate; pinnules oblong, obtuse, more or less toothed or lobed,— Vol II t liii
p. 55, — Canada to Tennessee and Arkansas. ’ ’
3. C. m o u tana, Bernh. Root-stock excessively slender ; fronds 3 to ■; inches Ion? ovate
pentagonal delicately 3-4-pmnate ; pfnnules incised, the teeth mostly emargiiiately bi-dematc. —
Vol. IL , t. Im., p. 53. — Labrador lo the Rocky Mountains of British America
21. ONOCLEA, L.
, I . • O. sen sib ilis ,• . L .. , fronds 2 - 15 inches long, triangular-ovate, pinnatifid • seame,
us smua e or simiately lobcel ; vems reticulated ; fertile fronds bi-pinnate ■ pinnules rolled ira
H o r id a "" '■ P- -D S -N e w Btnnsw.ci; to D a iJ^ fm d s ia T a am!
2. O. S t ru tb io p te r is , Hoffmann. Sterile fronds . to to feet high, broadly lanceolate
neiTowedat the base, pinnate with many Imear-lanceolate pinnatifid pinnæ i veins free ■ fenifc
froiKls siKirter, pinnate with pod-like or somewhat anicnlaled pinnæ. d Vol. t I s x i r 'p ,o
— New Bnmswick to the Saskatchewan, ami southward to the Middle States.
22. WOODSIA, R. B rown.
t. Ix., p. T 15 .-A r c t ic America to the mountains of New York and Northern New England
S S S a ^ N e W m ' k . ' ' ■“ ' - B n t i s h America and .he nonhen, parts'of New
p a ,e d e :i i .S îS j^ t l p™a.el™ *J A ' t S P S c f i S e
t. l I . p. . . . .R ü t i t i s h
* * Stalks not articulated ; fronds glandular-pubescent or smooth, not chaffy.
-I- Indusium o f a few broad segments, at firs t covering the somis.
lar Din A * “> ■= '»"S. broadly lanceolale, minately glandumen
! o!,mC f 1™ " '® triangular-ovate or triangular-lanceolate, obtnsf- segsorus.
•1- Indusium o f very i. ■J segments, or reduced to minute cilia, never covering the
jointed l ^ s æid I s n ^ lo 8 inches long, puberulent beneath with minute
oblong-o™ e m l cmmiht? 1 pmnate with deeply pinnatifid pinnæ, the lobes
ha irs— Vol I I t vv 1-, "Rlusia deeply cleft into narrow segments terminating in jointed
Vol. IL , t. Ixxi., p. 193. — Minnesota and Colorado to Oregon and Californk.