130 SWISS FEBNS. 



10. Asplenium. — Spleenwort. 



Sori linear, straiojht, parallel, scattered obliquely over the 

 back of the frond, 



A. Ruta-muraria. Fronds densely tufted, very small, 

 twice pinnate, with rhomboid stalked segments, the whole 

 having the look of a sprig of Rue. Sori become at last con- 

 fluent. Walls, rocks. 



A. Germanicum, very like the Wall-Rue, but the frond 

 is simply pinnate at the top, bi-pinnate lower down. 



A. septentrionale, Forked Spleenwort. Frond two to six 

 inches long, smooth and leathery, consisting of one stalk, 

 which divides near the top into two long linear segments, 

 pointed, and notched at the summit. Granite-rocks. 



A. Trichomanes (so-called Maiden-hair, but not the real), 

 a tufted spreading fern. Fronds from two to eight inches 

 long, with black shining stalks, simply pinnate. The seg- 

 ments broadly oblong, dark green, crenate. Walls, rocks. 



A. viride is very much like the above, only it has a green 

 stem. Abundant in many rocks of the Jura and the Alps. 



A. fontanum, Rock-Spleenwort. Stock thick, tufted ; 

 fronds from three to six inches long, bright green, oblong- 

 lanceolate, twice pinnate ; segments oval, having deeply- 

 notched lobes with pointed teeth. Rocks : Jura, and Alps. 



A. Filix-foemina, Lady-Fern. A tall fern, from two to 



