Polypodiaceee. 
431 
crispa R. Br.—Alp, on granite; G. T. W. Y. 0. U. 7 
crispus Bernh. 2605. 
686. Adiantum. Adiant. XXIV, 16. 
1. Fronds very delicate, 2-pinnatisect; segments obovate- 
cuneiform, inciso-lobed.—Damp rocks; transalpine Switz. 
Vaud (La Sarraz), NeucMtel (St. Aubin). 6 
Capillus Veneris L. 2606. 
687. Pteris. Brake or Bracken. XXIV, 12, 16. 
1. Fronds all of the same form, triangular-oval, 2 —3-pin- 
natisect. PI. 70—150cm. Pteridium aquilinum Kuhn.-- 
Thickety pasturages, peat-mosses. 7 aquilina L. 2607. 
— Fronds of 2 forms, simply pinnatisect, 30 —50 cm; seg¬ 
ments in 3—5 distant pairs; those of the barren fronds 
linear-lanceolate, denticulate-mucronulate; those of the 
fertile fronds much narrower, linear, with entire edges. 
Damp rocks; T. (Gandria, Locarno). 7 cretica L. 2608. 
688. Blechnum. Blechnum. XXIV, 11. 
1. Fronds simply pinnatipartite or pinnatisect; the barren 
ones lanceolate in contour, narrowed at both ends, with 
numerous linear - oblong, entire segments; the fertile 
ones higher, with narrower, more distant segments.— 
Woods; distrib. 7 . . . . Spicant Sm. 2609. 
689. Scolopendrium. Hart’s-tongue. XXIV, 17. 
1. Fronds rather shortly petioled, long-lanceolate, cordate 
at the base, gen. entire. S. officiarum Sw.—Damp, shaded 
rocks; distrib. (wanting in S.). 6 . vulgare Sm. 2610. 
690. Asplenium. Spleenwort. XXIV, 20. 
1. Fronds 5 — 15 cm, with 2—4 linear segments incised at 
the top.—Granite rocks, erratic blocks, not common 
(wanting in L. S.). 6 . . septentrionale Hoffm. 2611. 
— Fronds 1 — 3-pinnatisect (in A Ruta muraria the seg¬ 
ments are sometimes few, but broad) ... 2 
2. Fronds (5—15 cm) short-petioled, simply pinnatisect, 
linear in contour (segments oval-rhomboidal or suborbi- 
cular, numerous, as many as 30 on each side) . 3 
— Fronds, at least at the base, 2-pinnatisect, not linear in 
contour; petiole gen. as long as, or longer than, the frond 4 
3. Rachis stiff, black-brown, narrowly winged; seg¬ 
ments sessile, finely crenate, rarely (v. incisum) pinnati- 
fid.—Rocks and walls; everywhere. 6 Trichomanes L. 2612. 
— Rachis herbaceous, green, not winged; segments 
shortly stalked, of a lighter green and more deeply 
