MACLOSKIE: PTERIDOPHYTA, FERNS AND FERNLIKE PLANTS. 133 



not articulated on the rhizome. Sporesacs with incomplete vertical ring, 

 bursting transversely. 



Species 350, widely distributed. 



D. ACULEATA (L.) O. Kuntze. 



To i meter. Frond ovate-lanceolate, once-pinnate, and the lower 

 pinnae again pinnate ; coriaceous, evergreen. Teeth awned. Scales on 

 stalk and rachis. Sori in 2 rows near midveins. 



Fig. in Eng. & Pr. i. 4, p. 192 A. 



Cosmopolitan ; rare in U. S. S. Patagonia (by Hatcher). 



D. ADIANTIFORMIS (Forst. 1786) O. Kuntze. 

 (Polypodimn coriaceum Sw. 1788.) 



Frond subdeltoid, 60 by 40 cm., once-pinnate and the lower pinnae 

 twice-pinnatifid, the teeth not mucronate. Rachis polished. Sori broad, 

 in 2 rows, filling nearly all the space. 



(New Zealand & Pacific Is.; Austral.; Mascarenes ; S. Africa; Cuba to 

 Patagonia) ; S. Patagonia by R. Sta Cruz ; Lago Argentine ; Fuegia, 

 Beagle Canal. 



D. MOHRIOIDES (Bory) O. Kuntze. 



Stout, 25 cm. high. Frond once-pinnate, and the lower pinnae again 

 pinnate, the segments obtuse, not awned, slightly toothed. Stem and 

 rachis scaly. Sori copious. 



(Marion I., Chili) ; Patagonia ; W. Magellan at an elevation of 500 

 meters (Dusen). 



D. VESTITA (Forst). 







To 50 cm. Pinnae once-pinnate, and the lower pinnae again pinnate. 

 Rachis with red-brown fibrillae and dark brown scales. Teeth awned. 

 Sori 2-seriate, nearer the midnerve. 



(Tasmania; Auckland Is.); S. Fuegia. 



FILIX Adans. 1763. (Cystopteris Bern. 1811.) 



Fronds all flat. Sori roundish; indusium partly inferior, fixed by a 

 broad base, and enclosing the sorus as a hood. 

 Species 5, chiefly in northern zone. 



