ASPI.KNIUM VIIUDE. 



217 



Found in the moist rocky mountainous districts, growing in 

 the crevices of rocks. Under cultivation it is desirable to 

 have a large quantity of broken stone amongst the soil, and 

 grown in a cool moist situation. 



Stipes variable, brown at the base and green upwards. Rachis 

 slender and green, slightly grooved in front. 



Fronds varying from two to ten inches in length. Long, 

 linear, pinnate, and pale green. 



Pinna) variable, mostly a roundish-ovate, with a broadly 

 wedge-shaped base, or rhomboidal. Distant and opposite 

 below, alternate and more approximate above. 



Veins forking from a midvein, and terminating suddenly 

 within the border. 



Sori copious, linear-oblique, indusiate, and soon confluent. 



An evergreen species. 



There are a few varieties: — 



MuLTiFiDUM, JVoUaston. (Fig. 575.) — Found at Settle, in 

 Yorkshire, by Mr. A. Clapham, of E,amsdale Bank, Scarborough; 

 at Whitbarrow, in "Westmoreland, by Mr. E.. Morris; and at 

 Llanberris, in Carnarvonshire, by Dr. Allchin. It is also 

 common in other places. I gathered a number of plants in 

 1863, in Teesdale, on the Falcon Glints. Somewhat lax, and 

 bifid or multifid towards the apex. 



Fig. 576.— Middle. 



Fig. 577. — Base. 



Fig. 578.— Frond. 



Fig. 579 —Apex. 



Dbltoideum, Clapham. (Figs. 576 and 577.)— Introduced by 

 Mr. Clapham, of Ramsdale Bank, Scarborough. A deltoid form. 

 The pinntc very large at the base, rapidly becoming smaller 

 VOL. II. 2 F 



