127 
(b) Sorus of same (much magnified). 
(c) Polystichum aculeatum Roth. Pinnule (x 44). 
(d) Sorus of same (much magnified) 
(e) Cyrtomium faleatum Presi. Portion of pinna (x12). 
(f) Aspidium cicutarium Sw. Portion of frond (x 13). 
(g) Pleocnemia membranacea. Portion of frond (x 13). 
(A) Lastrea calcarata Hook. Portion of pinna ( x2,). 
(k) Nephrodium molle Desv. Portion of pinna ( x13). 
(1) Nephrolepis exaltata Schot. Portion of pinna ( 12). 
(o) A typical sorus of 7, g, h, k and 1. 
Genus XXIX.—Cyrromium Pres . 
(Deriv. unknown.) 
Indusium round, attached by the centre; 
veins generally anastomosing with free veinlets 
proceeding from their junction. 
Cyrtomium falcatum Presl. | 
Caudex erect. Stipes tufted, 6-12 inches long, 
densely clothed with huge brown scales. 
Frond 1-2 feet long, Janceolate, pinnate ; 
pinne stalked, ovate, acuminate, upper base 
suddenly narrowed, often auricled, lower base 
obliquely cut away, margin entire or slightly 
undulated. Texture leathery. Surfaces naked, 
shining. Rachis scaly like the stipe. Sori 
scattered over the under surface. [Fig. 41-¢.] 
The variety caryotidem Bedd. has larger, 
sharply toothed, slightly lobed pinnules, some- 
times auricled on both sides at the base. It is 
scarcely separable from the type and ‘is best 
considered as a mere form of C. falcatum. 
