Part 212 (1/2)

7. A. Bradleyi, D. C. Eaton. _Fronds oblong-lanceolate_, 4--7' long, besides the blackish and somewhat s.h.i.+ning stipe, membranaceous, pinnate; pinnae rather numerous, _the lower ones no larger than the middle ones_, all short-stalked, oblong-ovate, obtuse, incised or pinnatifid into oblong toothed lobes.--On rocks, Ky. and southward; rare. A single plant has been gathered near Newburg, N. Y.--Intermediate between A. ebeneum and A. montanum.

8. A. montanum, Willd. _Fronds ovate-lanceolate from a broad base_ (2--5' long), subcoriaceous, pinnate; pinnae ovate-oblong, the lowest pinnately cleft into oblong or ovate cut-toothed lobes, the upper gradually simpler; _rhachis green, broad and flat; stipe brown at base_.--Cliffs and rocks, from Conn. and Penn. to Ky., and southward.

July.

9. A. Ruta-muraria, L. _Fronds deltoid-ovate_ (1--2' long), subcoriaceous, laxly 2--3-pinnate at base, the pinnae alternate; _ultimate segments few_, stalked (2--5” long), _from narrowly cuneate to roundish-obovate_, toothed or incised at the apex; veins forking; sori 2--4 on a segment.--Limestone cliffs, Vt. to Mich., and southward; scarce. July. (Eu.)

[*][*][*][*] _Tall ferns (2--4 high), not evergreen; fronds pinnate or sub-bipinnate._

10. A. angustiflium, Michx. _Fronds_ thin, _simply pinnate; pinnae_ numerous, short-stalked, _linear-lanceolate, ac.u.minate_, entire or crenulate (3--4' long), _those of the fertile frond narrower_; fruit-dots linear, 20--40 each side of the midvein; indusia slightly convex.--Rich woods, W. New Eng. to Wisc., and southward along the mountains. Sept.

11. A. thelypterodes, Michx. (Pl. 18, fig. 1, 2.) _Fronds_ (2--3 high) _pinnate; pinnae deeply pinnatifid_, linear-lanceolate (3--5' long); the lobes oblong, obtuse, minutely toothed, crowded, each bearing 3--6 pairs of _oblong fruit-dots_, some of them double.--Rich woods; not rare.

July--Sept.

-- 2. ATHRIUM. _Indusium delicate, curved, often crossing the vein, and attached to both sides of it, thus becoming reniform, or shaped like a horseshoe._

12. A. Filix-f'mina, Bernh. Fronds (1--3 high) ovate-oblong or broadly lanceolate, twice pinnate; pinnae lanceolate, numerous; pinnules confluent on the secondary rhachis by a narrow margin, oblong and doubly serrate, or elongated and pinnately incised with cut-toothed segments; fruit-dots short, variously curved, at length confluent.--Moist woods; common and presenting many varying forms. July. (Eu.)

10. SCOLOPeNDRIUM, Smith. HART'S-TONGUE. (Pl. 18.)

Fruit-dots linear, elongated, almost at right angles to the midrib, contiguous by twos, one on the upper side of one veinlet, and the next on the lower side of the next superior veinlet, thus appearing to have a double indusium opening along the middle. (The ancient Greek name, so called because the numerous parallel lines of fruit resemble the feet of the centipede, or _Scolopendra_.)

1. S. vulgare, Smith. Frond oblong-lanceolate from an auricled-heart-shaped base, entire or wavy-margined (7--18' long, 1--2'

wide), bright green.--Shaded ravines and under limestone cliffs; central N. Y.; also in Canada and Tenn.; very rare. Aug. (Eu.)

11. CAMPTOSRUS, Link. WALKING-LEAF. (Pl. 18.)

Fruit-dots oblong or linear, as in Asplenium, but irregularly scattered on either side of the _reticulated veins_ of the simple frond, those next the midrib single, the outer ones inclined to approximate in pairs (so that their two indusia open face to face), or to become confluent at their ends, thus forming crooked lines (whence the name, from ?apt??, _bent_, and s????, for _fruit-dot_.)

1. C. rhizophllus, Link. Fronds evergreen, sub-coriaceous, growing in tufts, spreading or proc.u.mbent (4--12' long), gradually narrowed from a cordate or auricled base to a long and slender ac.u.mination, which often roots at the end and forms a new plant.--Shaded rocks, especially calcareous rocks, N. Eng. to Minn., and southward to Kan. and Ala.--The auricles are sometimes greatly elongated, and even rooting; in another form they are lacking, as in the thinner leaved C. Sibiricus. July.

12. PHEGoPTERIS, Fee. BEECH FERN.

Fruit-dots small, round, naked (no indusium), borne on the back of the veins below the apex. Stipe continuous with the rootstock.--Our species have free veins and bright green membranaceous fronds, decaying in early autumn. (Name composed of f????, an _oak_ or _beech_, and pte???, _fern_.)

[*] _Fronds twice pinnatifid; pinnae all sessile, adnate to the winged rhachis._

1. P. polypodiodes, Fee. Fronds triangular, _longer than broad_ (4--9'

long), hairy on the veins, especially beneath; pinnae linear-lanceolate, _the lowest pair deflexed and standing forward_; their divisions oblong, obtuse, entire, the basal decurrent upon the main rhachis; fruit-dots all near the margin.--Damp woods; common northward. July.--Rootstock slender, creeping, bearing a few distant slender stalks, rather longer than the fronds. (Eu.)

2. P. hexagonoptera, Fee. Fronds triangular, _usually broader than long_ (7--12' broad), slightly p.u.b.escent and often finely glandular beneath; pinnae lanceolate; upper segments oblong, obtuse, toothed or entire, _those of the very large lowest pinnae elongated and pinnately lobed_, basal ones very much decurrent and forming a continuous many-angled wing along the main rhachis; fruit-dots near the margin; some also between the sinus and the midrib.--Rather open woods, New Eng. to Minn., and southward; common. July.--Larger and broader than the last, which it often closely resembles.

[*][*] _Fronds ternate, the three divisions petioled; rhachis wingless._

3. P. Dryopteris, Fee. _Fronds smooth_, broadly triangular (4--6' wide); the three triangular primary divisions _all widely spreading_, 1--2-pinnate; segments oblong, obtuse, entire or toothed; fruit-dots near the margin.--Rocky woods; common northward. July. (Eu.)

4. P. calcarea, Fee. _Fronds minutely glandular_ and somewhat rigid, _the lateral divisions ascending_; lowest inferior pinnae of the lateral divisions smaller in proportion than in the last species, which it otherwise closely resembles.--Iowa and Minn.; rare. July. (Eu.)

13. ASPiDIUM, Swartz. s.h.i.+ELD FERN. WOOD FERN. (Pl. 19.)