CHARACTERS OF TRIBES AND GENERA. 311 



Illust. Metten. Fil. Hort. Lips., t. 6, f. 6, 7 ; J. Sm. 

 Ferns, Brit, and For., fig. 107 ; Hook. Syn. Fil., t. 4, 

 fig. 36 b. 



OBS. The single species constituting this genus is placed 

 by most authors in Woodwardia, but its sarmentose, hy- 

 pogeous vernation and contracted fertile fronds have in- 

 duced me to follow Presl, and adopt it as a distinct genus. 



Sp. L. areolata, Presl (v v.) ; L. Harlandii (Hook. Fil. 

 Exot., t. 7). 



The first is a native of North America and the second of 

 Hong-Kong. 



177. ANCHISTEA, Presl. (1849). 

 Woodwardia Sm. Hook. Sp. Fil. 



Vernation uniserial ; sarmentum hypogeous. Fronds 

 bipinnatind, 1 to 2 feet high. Veins flabellately forked ; 

 the lower venules transversely anastomosing and sporang'i- 

 ferous. Sori oblong, contiguous, in a continuous costal 

 row. Indusium linear plane. 



Type. Bleclinum virginicum, Linn. 



Illust. Metten. Fil. Hort. Lips., t. 6, f. 1, 2 ; J. Sm. Ferns, 

 Brit, and For., fig. 105. 



OBS The reasons assigned for retaining the last genus 

 are applicable to this, wliich also consists of one species, a 

 native of North America. 



Sp. A. virginica, Presl. (v v.). 



178. ONOCLEA, Linn., in part (1751). 

 Hook. Sp. Fil., in part. 



Vernation uniserial, distant; sarmentum hypogeous. 

 Sterile fronds sub-bipinnatifid. Veins reticulated. Fertile 



