136 ENGLISH BOTANY. 



Yar. y. pseudo-Germanicum. "Heufler," Milde. 



A. Euta-muraria, var. cuneatum, Moore, Nat. Print. Brit. Ferns, 8vo. ed. Vol. II. p. 124. 

 Non A. cuneatum, Lamarck. 



Frond bipinnate or scarcely more than pinnate, narrow ; ultimate 

 segments long, oblanceolate-strapshaped, very narrowly wedgeshaped 

 at the base, truncate and toothed at the apex. Stipes usually longer 

 in proportion to the lamina than in var. a. 



On rocks and walls, common and generally distributed, extending 

 to Orkney. Frequent throughout Ireland. Var. /3, Derbyshire, 

 Cumberland, and the south and west of Ireland, and probably else- 

 where. Yar. y Pass of Llanberis, Carnarvon ; and near Bristol. 

 Stenton Rock, near Dunkeld, Perth. Yar. cristatum seems to be a 

 monstrous form of this, found near Tunbridge Wells (Kent) ; and 

 Ruthin Castle (Denbighshire). 



England, Scotland, Ireland. Perennial. Summer, Autumn. 



Plant growing in very dense tufts. The stipes is very variable in 

 length in proportion to the lamina, even in fronds from the same 

 tuft. The scales are strongly clathrate, with the network very thick. 

 The lamina is § inch to 2i inches by ^ to 1 J inch broad. The ultimate 

 segments vary from \ to h inch long in vars. a and j3, but in var. y 

 they are f inch long or even more. 



In young plants the first fronds are entire and somewhat resemble 

 one of the segments of the barren frond of Botrychium Lunaria : they 

 are much thinner in texture than in the mature plant. These fronds 

 are succeeded by trifoliate ones. 



Dwarf forms are sometimes trifoliate or pinnate. 



Yar. y is frequently little more than pinnate with the long ultimate 

 segments connected at the base. It has sometimes been mistaken for 

 A, G-ermanicum, which see. 



Wall Rue. 



SPECIES IX.— AS PL EN IUM GERMANICUM. Weiss. 



Plate 1881. 



Babenh. Crypt. Vase. Europ. Exsicc. No. 88. 



A. alternifolium, Wulf. Sm. Eng. Bot. ed. i. No. 2258 ; and Eng. Fl. Vol. IV. p. 309. 



A. Breynii, Betz. Fries, Summ. Veg. Scand. p. 82. Koch, Syn. Fl. Germ, et Helv. 



ed. ii. p. 983. Gren. & Godr. Fl. de France, Vol. III. p. 637. 

 Tarachia Germanica, Presl, Epim. Bot. p. 79. 

 Amesium Germanicum, Newm. Hist. Brit. Ferns, ed. ii. p. 10, and ed. iii. p. 258 ; and 



Phytol. 1851, App. p. vii. 

 Scolopendrium alternifolium, Moth, Fl. Germ. Vol. III. p. 53. 



Caudex short, divided into several closely packed scaly crowns ; 



