CL. XXIV. ]] CRYPTOGAMIA FERNS. 391 



having the above characters sometimes grow from the same root with 

 others having the characters of A. Ruta-muraria, Eng. Bot. vol. xxxii. 

 pi. 2258. Eng. Ft. vol. iv. p. 309. 1486. 



6. A. septentriondle. Forked Spleenwort. Fronds two or three-cleft ; 



segments linear, pointed and jagged at the summit. Fronds in a 



dense tuft, erect, consisting of a thread-shaped stalk, divided at the top 

 into two or three narrow segments. Perennial: bears fruit from June to 

 October: grows on rocks in Scotland, Wales, and north of England. 

 Eng. Bot. vol. xv. pi. 1017. Eng. F /. vol. iv. p. 308. 1487. 



7. A. Adidntnm-nigrum. Black Maidenhair Spleenwort. Frond be- 

 tween lance-shaped and triangular, alternately thrice pinnate ; leaflets 

 lance-shaped, pointed, deeply serrate. Fronds about a foot high : stalks 

 scaly at the base, dark-brown, shining. Perennial : bears fruit from June 

 to October: grows on rocks, walls, and shady banks: common, Eng. 

 Bot. vol. xxviii. pi. 1950. Eng. Fl. vol. iv. p. 310. 1488. 



8. A. lanceolutum. Green Lance-shaped Spleenwurt. Frond lance- 

 shaped, twice pinnate ; leaflets and segments deeply toothed. Fronds 



six or eight inches high : stalks brown at the base. Perennial : bears fruit 

 from June to October: grows on rocks and old walls, in the south of 

 England: very rare. Jersey; near Bath, Cornwall, and Oxfordshire. 

 Eng. Bot. vol. "iv. pi. 240. Eng. Fl. vol. iv. p. 311. 1489. 



9. A. fontdnum. Smooth Reck Spleenwort. Frond between lance- 

 shaped and linear ; leaflets and segments wedge-shaped, deeply toothed ; 



stem and partial stalks bordered. Fronds from two to six inches high, 



very smooth. Perennial : bears fruit from June to September : grows on 

 rocks and old walls, in England : very rare. Found by Mr. Bradney, on 

 Amersham church, Bucks. Eng. Bot. vol. xxix. pi. 2024. 1490. 



7. SCOLOPE'NDRIUM. HART'S-TONGUE. 



Sori linear, straight, in pairs, scattered obliquely over the back 

 of the frond, each pair between two parallel veins. Covers mem- 

 branous, continuous, linear, their edges folded over the capsules, 

 finally separating. Capsules numerous, stalked, globular, two- 

 valved, with a jointed ring. Seeds numerous, minufe. Named 

 from the lines of fructification resembling the feet of a scolo- 

 pendra. 466. 



1. S. vnlgdre. Common Hart's- tongue. Frond lance-shaped, heart- 

 shaped at the base, smooth ; stalk and shaft scaly. Fronds a foot or 



more high, deep grass-green. Perennial : bears fruit in July : grows on 

 rocks, walls, and banks. Eng. Bot. vol. xvi. pi. 1156. Eng. Fl. vol. iv. 

 p. 314. 1491. 



8. BLE'CHNUM. HARD-FERN. 



Sori linear, straight, continuous, parallel to the central rib on 

 each side, at the back of each segment of the fertile fronds. Cover 

 membranous, linear, continuous, arising from near the margin of 

 the frond and opening towards the rib. Capsules numerous, 

 stalked, globular, two-valved, with a jointed ring. Seeds nu- 

 merous, minute. Name, blechnon, the Greek for a fern. 467. 



1. B. boredle. Northern Hard-fern. Fronds smooth, pinnate, pecti- 



