CHARACTERS OF TRIBES AND GENERA, 311 
Ilust. 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. 
Oxs.—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. 
Beat, t. 7). 
The first is a native of North America and the second of 
Hong-Kong. 
177.—ANcnrsTEA, Presl. (1849). 
Woodwardia Sm. Hook. Sp. Fil, 
Vernation uniserial; sarmentum hypogeous. Fronds 
bipinnatifid, 1 to 2 feet high. Veins flabellately forked ; 
the lower venules transversely anastomosing and sporangi- 
ferous. Sori oblong, contiguous, in a continuous costal 
Tow. Indusium linear plane. 
Type. Blechnum virginicum, Linn, 
Ilust. Metten. Fil. Hort, Lips., t. 6, £. 1,2; J. Sm. Ferns, 
Brit. and For., fig. 105. 
Oss— The reasons assigned for retaining the last genus 
are applicable to this, which also consists of one species, a 
native of North America. 
Sp. A. virginica, Presi, (v v.). 
178.—Onocira, Linn., in part (1751). 
Hook, Sp. Fil., in part. 
 Pernation uniserial distant; sarmentum hypogeous. 
Sterile fronds sub-bipinnatifid. Veins reticulated. Fertile 
