390 CEYPTOGAMIA FERNS. [CL. XXIY. 



stalk slender, dark and polished, with a few scales at the base. 

 Perennial : bears fruit in. June and July : grows on wet shady 

 rocks and in stony places : common, especially in Scotland. Eng. 

 Bot. vol. xxiii. pi* 1587. Eng. Fl vol. iv. p. 299. 1480. 

 2. C. dentdta. Toothed Bladder-fern. Frond between oblong 

 and lance-shaped, twice pinnate; leaflets egg-shaped, obtuse, pin- 

 natifid ; the segments oblong, obtuse, toothed, partial stalks bor- 

 dered. Fronds from four to ten inches high. Perennial: bears 



fruit in July : grows in the clefts of rocks, in Wales and the High- 

 lands of Scotland. Eng. Bot. vol. xxiii. pi. 1588. Eng. Fl. vol. iv. 

 p. 155. A common variety of this plant, with broader fronds, be- 

 tween oblong and egg-shaped, has been described as the C. angus- 

 tdta, Deeply -cut Mountain Bladder-fern. Eng, Fl. vol. iv. p. 301. 



1481. 



6. ASPLE'NIUM. SPLEENWORT. 



Sori linear, straight, parallel, scattered obliquely over the 

 back of the fronds, between the central rib of each leaflet or 

 lobe, and the next rib or vein. Cover membranous, continuous, 

 straight, linear, arising from a vein, and opening at the oppo- 

 site margin, towards the central rib or vein. Capsules nume- 

 rous, globular, stalked, one-celled, two-valved, with a jointed 

 ring Name from , without, and splen, the spleen. 465. 



1. A. Trichomanes. Common Maidenhair Spleenwort. Frond linear, 

 pinnate ; leaflets broadly oblong, or roundish, crenate ; stem and 



shaft coloured, shining, keeled beneath. Fronds from four to 



eight inches high, with a brown stem and shaft, and dark-green 

 leaflets. Perennial : bears fruit from May to December : grows 

 on shady rocks and walls : common. Eng. Bot. vol. viii. pi. 576. 

 Eng. Fl. vol. iv. p. 305. 1482. 



2. A. viride. Green Maidenhair Spleenwort. Frond linear, pin- 

 nate ; leaflets obliquely egg-shaped, somewhat acute, widely and 



obtusely serrate; shaft keeled beneath. Fronds about five 



inches long, bright-green : stalk reddish-brown : shaft green. Pe- 

 rennial : bears fruit in June and July : grows on rocks, in the High- 

 lands of Scotland, the north of England and Wales : common. Eng . 

 Bot. vol. xxxii. pi. 2257. Eng. Fl. vol. iv. p. 306. 1483. 



3. A. marinum. Sea Spleenwort. Frond lance-shaped, pinnate ; 

 leaflets obliquely egg-shaped, very obtuse, obtusely crenate ; the 



shaft coloured along the back. Frond about eight inches high, 



rather stout, firm, dark green ; stem and the back of the shaft 

 dark-brown. Perennial : bears fruit in June and July : grows on 

 rocks along the coast : common in Scotland. Eng. Bot. vol. vi. pi. 

 392. Eng. FL vol. iv. p. 307. 1484. 



4. A. Ruta-murdria. Wall-rue Spleenwort. Frond alternately 

 twice compound ; leaflets broadly diamond-shaped, notched on the 

 two upper edges. Fronds from two to four inches high. Pe- 

 rennial : bears fruit from June to October : grows on rocks and 

 old walls: common. Eng. Bot. vol. iii. pi. 150. Eng. Fl. vol.iv. p. 

 309. 1485. 



5. A.alternifolium. Alternate-leaved Spleenwort. Frond pinnate ; 



leaflets alternate, wedge-shaped, notched at the end. Fronds 



from three to six inches high, with brown shining stalks. Peren- 

 nial : bears fruit from June to October : grows on rocks, near Kelso 



