SWISS FERNS. 12<> 



P. Robertiana is a stouter plant, with scaly, glandular 

 meal on the stalk and veins. 



Polypodium vulgare, the common Polypody. Fronds 

 from six inches to a foot long, deeply pinnatifid, scaly at 

 the base ; segments often connected by their broad base ; 

 sori large, yellow, in two rows on the back of the frond at 

 the upper part. Rocks and old trees. 



8. Ceterach officinarum. — Scaly 

 Hart's-tongue. 



Fronds tufted, from two to ten inches long, leathery, 

 deeply pinnatifid, with rounded, thick, entire, and confluent, 

 segments. Green above, and covered with reddish scales 

 beneath. Rocks and old Avails. 



9. Scolopendrium vulgare.— Hart's- 

 tongue. 



Fronds tufted, undivided, broadly linear, heart-shaped at 

 the base, from half-a-foot to two feet long. Sori arranged 

 in parallel slits at the back of the frond. Shady rocks. 



