230 CHARACTERS OF TRIBES AND GENERA. 



OBS. A native of the West Indies and many parts of 

 tropical America, the East Indies, Malayan, Java, Philippine, 

 and Fiji islands, tropical West and South Africa, and East 

 African islands. As might be expected, this wide geo- 

 graphical range has led to this Fern being described under 

 five generic and eight different specific names. 



** Sori punctiform, rarely linear, naked, or included under 

 an universal indusium. 



Sect. 6. STRUTHIOPTERE^E. 

 Sori punctiform, included under an universal indusium. 



121. STRUTHIOPTERIS, Willd. (1810). 

 Onoclea, sp. Hook., Sp. Fil. 



Vernation fasciculate, erect, sub-arboroid. Fronds dimor- 

 phous, 1 to 3 feet high, the sterile lanceolate, pinnate, 

 pinnae lanceolate, sessile, 4 to 6 inches long, pinnatifidly 

 lobed, venules in the lobes pinnate. Fertile contracted, 

 produced in a compact fascicle, from the centre of verna- 

 tion, shorter than the sterile, re volute, the opposite margins 

 conniving, forming a universal indusium (siliquaform). 

 Veins pinnate, venules short. Receptacles punctiform, 

 lateral, pedicils of the sporangia concrete. Sori confluent, 

 irregular, or in a transverse row. 



Type. Strufhiopteris germanica, Willd. 



Illust. Hook, and Bauer, Gen. Fil , t. 69 A : Moore, Ind. 

 Fil., p. 54 B. ; J. Sm., Ferns, Brit, and For., fig. 82. 



OBS. This genus agrees in habit and normal structure 

 with the bipinnatifid species of Phegopteris, differing only 

 in the fertile fronds being contracted as in Lomaria. 



It is represented in Europe by S. germanica, and in 

 North America by S. pennsylvanica, and in India by S. 



