P C O N SP E C TU S .
at tlie base, smooth or slightly pubescent ; pinnæ short-stalked, lanceolate ; lobes oblong-ovate,
obtuse, mostly entire ; lower veins or all o f them forked, sori not near the margin ; indusia
delicate. — Vol. I., t. xxx., p. 233. — Lake Winnipeg to Louisiana and Florida.
-I- -1- Rooi-stock short, bearing clusteredfronds.
= Fronds conspicuously narrowed at the base.
3. A . Ne vad en se , Eaton. Fronds i to 3 feet long, narrowly lanceolate ; pinnæ linear-
lanceolate ; segments 3 to 5 lines long, scarcely one line broad, oblong, entire or sparingly
toothed, resinous-dotted and slightly hairy beneath ; veins mostly simple ; sori near the margin ;
indusia minute, glandular and hairy. — Vol. L, t. x., p. 73. — California.
4. A . Oreoptoris, Swartz. Fronds i to 3 feet long, lanceolate ; pinnæ lanceolate from
a broad base ; segments 3 to 6 lines long, about 2 lines broad, oblong, entire or crenulate,
glandular beneath ; veins often forked; sori near the m.ugin; indusia fugacious. — Vol. II., p.
273. — Unalaska.
5. A . conterminum, Willd.? Root-stock erect; fronds i to 4 feet long, lanceolate,
rather rigid, very short-stalked ; pinnæ sessile, narrowly lanceolate, acuminate, segments 2 to 4
lines long, oblong, obtuse, subfalcate, resinous-dotted and slightly hairy beneath ; veins simple ;
sori near the margin; indusia glandular and h.iiry, evanescent. — Vol. IL , p. 278. — Florida.
= = Fronds scarcely 7iarro^oed a t the base.
6. A . p a ten s , Swartz. Fronds i to 3 feet long, oblong-ovate, acuminate; pinnæ linear-
acuminate, incised from half to three-fourths of the way to the midi'ib ; segments obliquely
oblong, rather acute, basal ones largest ; veins simple, the lowest ones o f adjacent segments sometimes
united; sori rather remote from the margin; indusia pubescent.— Vol. IL , t. Ixx., p. 18 1.
— Florida to California.
* * Fronds firmly membranaceous or sub-coriaceous, often evergreen ; some o f the veins
pinnately branching or more than once forked, always free.
Fronds large, pinnate with pinnatifid pinnce ; indusia flat, persistent.
7. A . c rista tum , Swartz. Fronds smooth, lincar-oblong or oblong-lanceolate, slightly
narrowed towards the base, i to 2 feet long ; fertile ones tallest ; pinnæ triangular-oblong, the
lowest ones triangular-ovate ; segments oblong, obtuse, mostly closely placed ; sori midway from
the margin to tlie raidvcin. — Vol. II.,.t. kv i., p. 15 3. — Newfoundland to Arkansas.
8. A . F lorid anum , Eaton. Sterile fronds like those of the last; fertile fronds with the
lower and shorter pinnæ triangular-lanceolate and deeply pinnatifid, "the upper pinnæ alone
fertile, longer and narrower and with usually remote oblong obtuse crenulate-toothed pinnules
sessile on a narrowly winged secondary rachis; sori as in the last. — Vol. IL , t. Ixvii., p. 159. —
Florida to Louisiana.
9. A . Goldianum, Hooker. Fronds smooth, broadly oblong-ovate ; i to z i feet long ;
pinnæ mostly broadest in the middle, 5 to 8 inches long, i to 2 \ broad ; segments numerous,
oblong-linear, slightly falcate, crenate or serrate; sori near the midvein; indusia very large,
orbicular with a narrow sinus. — Vol. I., t. xl., p. 305. — Canada to Kentucky.
Fronds large, sub-coriaceous, twice pinnate near the base, but the tipper pinnules
confluent on the secondary rachis ; indusium firm, convex, persistent. Stalks very chafiy with
large scales.
= S o ri not close to the margin o f the segments.
:
CO N S P E C TU S .
10. A . P ü ix -m a s . Swaitz. Fronds i to 3 feet long, broadly oblong-lanceolate someM hat
narrowed towards the base; pmnæ lanceolate-acuminate from a broad base; p in n d e sT S
men s ob ong to ovate-lanceolate, obtuse or acute, toothed or incised, not glándula?but s o m e S s
n e ît -mdvein commonly only on the lower half o f each segment.—
Vol. I., t. xh., p. 3 1 1 . — Canada and North-western Michigan, Dakota, and Colorado
1 1 . A . rig id um , Swartz. Fronds i to 2 feet long, glandular beneath ovate-lanceohtp
scarcely naiTOwed at the base ; pinnæ oblong-lanceolate ; pinnules or segments oblong, obtusé
or acme, doubly serrate or incised,v e rp e in son near the midvein, indusium glandular.— Calif''--’'’'' °
.V. mi,iatru, very v e in y ;
Vol. IL , t, xlvi., p. I. — Oregon and California.
= = Sori very close to the margin.
12 . A . marginale , Swartz. Fronds r to z feet long, ovate-lanceolate, not glandular ■
: , anoeoktc, upper ones nairovver; segments oblong or oblong-hnceolatt
le T c d o r S " VoT i f ? to Alabam i ,6 9”. — New nB r°n 'n s“w‘.'cVit“ t"o the Rocky Mountains, and south“wfa“rd“
P Y f P f f y ' 'p m im b r m , a c m , s , fully twice p ium il,: i„ iu s ia rulhercnulL
less firm, flat, at length shrivelled or deciduous.
13. A . sp in ulo sum , Swartz. Fronds i to 3 feet long, all alike, ovate to ovate-oblong
but httle narrowed at the base ; pmnæ short-stalked, the lowest ones triangular-lanceolate up pS
ones gradually narrower; pinnules oblong, pinnate or pinnately incised with splnulose-setrMe
I? “ ê k n d u la r .-V o l .IL , t. Ixviii., p. 163. - Newfoundland to
British Columbia and Oregon, extending southward to Arkansas and North Carolina.
TflPr Tuckerman. Fronds i to 2^ feet long; sterile ones smaller and simpler,
fertile ones elongated-lanceolate, somewhat narrowed at the base; the lowest oinnæ
narrower; pinnules oblong-ovate, sharply serrate
with spinulose teeth, the lower ones often pinnatifid ; indusium minutely glandular. — Vol I I
t. Ixix., p. 17 5. — New England to Delaware.
Ia rg 4 'p 4 s i î î e 4 small and crowded pinnules; indusia very
aromifie ^ to lo inches long, very chaffy, glandular and
^omatic lanceolate, narrowed towards tlie base; pinnules i to 2 lines long, oblong, obtuse,
1 T indusia very large, imbricating, orbicular with a very naiTow
S and nI w Eugtond. "> Superior and the .nonntains of New
X fi. glabrum, Mett. Root-stock long and cord-like, blackened ; fronds
rouSdLl smooth; pinnæ pinnatifid halfway to the midrib into
- v J T i ^ lower vems o f contiguous lobes united ; indusium commonly smooth,
vol. 1., t. xm., p. 93. — Florida.
een tr ÎA e jF ^ '^ fi^ ^ ^ ^ ^ fi and entire, fix ed by the depressed centre or short
Z b i e t i l . Z i and pinnules-often auricled on the upper side o f
me oase, veins free. Fronds mostly evergreen.