ASPIDIUM. 



473 



A. squarrosum — squar-ro'-sum (rough), Don. 



This plant, also known as A. rufo-barbatum of Wallich, is a form of 

 A. aculeatum, having the rachis (stalk of the leafy portion) densely covered 

 with reddish-brown scales. 



A. (Polystichum) Thomsoni — Pol-ys'-tich-um ; Thom'-s-oni (Thomson's), 

 Hooker. 



A greenhouse species, of small dimensions, native of the Himalayas, 

 where it is found at elevations varying between 7000ft. and 13,000ft. Its 

 fronds, Gin. to Sin. long and barely lin. broad, are borne on slender, straw- 

 coloured stalks 2in. to 4in. long and scaly. The pinnae (leaflets) are |in. 

 long, Jin. broad, and unequal- sided, the lower side the smaller, and obliquely 

 truncate at the base ; they are of a somewhat leathery texture, and their 

 lobes are furnished with sharp teeth. The sori (spore masses) are mostly 

 disposed one to each lobe. — Hooker, Species Filicum, iv., p. 7. Beddome, 

 Ferns of British India, t. 126. 



A. trapezioides — trap-e-zi-o-i'-des (trapezium-like). Synonymous with 

 A. viviparum. 



A. triangulare laxum — tri-ang-ul-a'-re lax'-um (triangular, loose). 



A garden name for a Fern with elegant, long, and very narrow 

 fronds of a particularly drooping character, possibly a pendulous form of 

 A. ilicifolium ; it is useful for decoration on account of its leathery texture 

 and of the lasting quality of its foliage. — Nicholson, Dictionary of Gardening, 

 i, p. 127. 



A. (Polystichum) triangulum — Pol-ys'-tich-um ; tri-ang'-ul-um (tri- 

 angular), Swartz. 



A stove species, native of the West Indies. Its fronds are 1ft. or more 

 long and ljin. to 2in. broad, and are borne on stalks 2in. to 6in. long, with 

 large, dark brown scales at the base. The numerous pinnae (leaflets), of 

 a leathery texture, are sessile (stalkless) and sharply pointed, and their 

 edges, which are nearly entire or slightly lobed, are furnished with blunt 

 teeth ; the base is auricled (eared) on one or sometimes both sides. The 

 spore masses are principally disposed in two rows near the edge. — Hooker, 

 Species Filicum, iv., p. 14. Nicholson, Dictionary of Gardening, i., p. 127. 



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