Polypod iaceae. 
433 
covered underneath with scales of a russet brown.— 
Walls, rocks; not everywhere; T. W. V. J. U. L. Z. A. 5 
officinarum Willd. 2620. 
693. Phegopteris. Phegopteris. XXIV, 22. 
1. Fronds shortly petioled, the petiole several times shorter 
than the frond. Comp. Athyrium rhceticmn. 
— Ls long-petioled, the petiole as long as, or longer than, the 
frond. ... 2 
2. Fronds oval-lanceolate in contour, long-acuminate, hairy, 
pinnatisect with pinnatifid segments, of which the lower 
are gen.directed downwards.—Shady woods in the mount.; 
distrib. 6 .... polypodioides Fee. 2621. 
— Fronds broad-triangular in contour, glabr. or glandular, 
the base ternate and 2-pinnatisect ... 3 
3. Fronds thin, soft, briglit-green entirely glabr. and with¬ 
out glands.—As the last. 6 Dryopteris Fee. 2622. 
— Fronds rather stiff, yellowish green, finely glandular 
underneath. Rt-stock shorter and thicker than in the 
last.—Rocks, walls; especially on calc. soil. 6 
Robertianum A. Br. 2623. 
694. Aspidium. Shield-fern* XXIV, 21. 
1. Tegument reniform, fixed in the incision (laterally). 
Polystichum. ........ 2 
— Tegument orbicular, fixed in the centre (peltate). Fronds 
shortly petioled. Aspidium .7 
2. The 2 ramifications of the lower lateral nerves bearing 
a group of sporangiee. Tegument deciduous. Fronds 
simply pinnatisect with pinnatifid segments; last seg¬ 
ments entire or slightly sinuate (rarely crenate or in¬ 
cised) ......... 3 
— Only the foremost branch of the lateral nerves bearing 
a group of sporangiee. Tegument persistent for a longer 
time. Fronds 2—3-pinnatisect; segments of the last order 
pinnatifid or toothed ...... 4 
3. Rt-stock slender, long creeping. Fronds long- 
petioled (petiole about as long as the frond), soft, light 
green, without glands underneath when full-grown, of 
the same breadth at the base, or hardly contracted.— 
Peat-mosses, in patches, distrib. 6 Tlielypteris Sw. 2624. 
— Rt-stock thick, oblique or horizontal. Fronds shortly 
petioled (petiole much shorter than the frond), soft, of 
an almost yellowish green, glandular underneath, 
much and insensibly narrowed to the base. A. Oreo- 
pteris Sw.—Woods; distrib., but not common. 7 
montanum Aschers. 2625. 
