432 
Polypodiaceee. 
crenate than in the last.—As the last, especially in the 
mount, and subalp.; distrib. 6 . viride Huds. 2613. 
4. Fronds (5—15 cm) narrow-lanceolate in contour, 2 pin- 
natisect at the base, from the middle to the top simply 
pinnatisect. About intermediate between 2611 and 2616; 
segments more numerous than in the first (4—10), nar¬ 
rower than in the last; indusium entire at the edges. 
A. Breynii Retz. —Granite rocks in the mount, and 
subalp., rare, gen. in company with A. sept, and A. 
Trichom. (according to Ascherson and Loret a hybrid 
between these 2 species, according to Bory ==■ A. rut. 
mur. — sept.) G. T. W. 0. A. 6 germanicum Weiss. 2614. 
— Fronds 2—3-pinnatisect ..... 5 
5. Fronds (15— 25 cm) linear-lanceolate in contour, nar¬ 
rowed at the base (lowest pair of pinnse shorter than 
the central ones); pinnules short, with mucronate teeth. 
A. Halleri Dec.—Rocky places, especially on calc.; 
Tess., Rhone-valley, Saleve, Jura, from Geneva to the 
Ramsfluh and Lagern, lake of Wallenstadt. 6 
fontanum Bernh. 2615. 
— Fronds triangular-oval in contour, or oval-lanceolate, 
the lower divisions longer than the middle ones 6 
6. Rachis green, or only black-brown at the base. Fronds 
5—15cm, dull; segments of the last order oblong-ob- 
ovate or rhomboidal-cuneiform, obtuse, crenate-toothed 
in front. Tegument ciliate. Very variable.—Walls and 
rocks; everywhere. 4 . . Ruta muraria L. 2616. 
— Rachis black-brown to above the middle. Fronds 
10—30cm, shining above, the point elongated; segments 
of the last order obovate-cuneiform, toothed at the top. 
Tegument with entire or wavy edges.—As the last, but 
much rarer and especially in the mount, and subalp. 
regions (wanting in Z. S.) 6 Adiantum nigrum L. 2617. 
691. Athyrium. Athyrium. XXIV, 20. 
1. Tegument distinct. Ls 6—12 dm, oblong-lanceolate, light 
green, 2-pinnatisect, with pinnatifid segments. Differing 
from 2629 both in its more finely divided ls and its 
more glabr. rachis.—Woods; everywhere. 7 
Felix femina Roth. 2618. 
— Tegument very small and only visible in its first youth. 
In other respects the pi. resembles the last. Aspidium 
alpestre Nyl.—Alp., subalp. and Jura, sometimes together 
with the last. 7 rhseticum (L.) Grml. 2619. 
692. Ceterach. Ceterach. XXIV, 14. 
1. Fronds 5 — 15 cm, rather coriaceous, shortly petioled, 
pinnatipartite, with alternate, oval or oblong, segments, 
