The Ferns of Washington 11 



2. Polystichum munitum (Kaulf.) Presl. (Figs. 53, 



56, 67.) 



Sword Fern. 



Leaves 2-5 feet long, with petiole and leaf-axis and 

 mid-vein of leaflets scaly; petiole of medium length; 

 leaf-blade lanceolate, 1-pinnate; leaflets horizontal, 

 linear, strongly auricled on the upper side, spinulose- 

 serrate. Sori close together, one row between the 

 margin and mid-vein, nearer margin. — Alaska to Idaho 

 and California. — Much used for decorating because it 

 is large, tough and evergreen. 



3. Polystichum munitum imbricans (Eat.) Max. 

 (Figs. 58, 59.) 



Leaf-blades lanceolate, 1-2 feet long; leaflets oblique 

 to the mid- vein, overlapping, broadly lanceolate. — On 

 dry rocky slopes of mountains. Washington to Cali- 

 fornia. 



4. Polystichum Lemmoni Underw. (Fig. 62.) 



Leaves 2-pinnate or partly so, 6-12 inches long, 

 densely tufted, very scaly at base, slightly so above; 

 petioles of medium length; primary divisions ovate, 

 rounded at ends, consisting of 6-10 oval obtuse crenate 

 divisions or leaflets besides the terminal one. Sori 

 small, few, 1-2 to each leaflet or division.— In high 

 altitudes. Alaska to California. 



5. Polystichum scopulinum (Eat.) Max. (Fig. 63.) 

 Leaves 1-2 feet long; petiole nearly as long as the 



blade; blade lanceolate, 2-pinnate below; scales on 



rachis small and few, at base of petiole largo and many: 

 primary leaf-divisions divided at base, serrate with 

 incurved teeth, blunt or rounded at tip. Sori 1-6 on 

 each leaflet or lobe of primary leaf-division; indusium 

 large, more or less lobed .— Washington and Idaho to 

 California. 



[To be Continued] 



