CATALOGUE OF FEENS. 
37 
elevated, the lower venules only anastomosing, or the whole uni- 
form reticulated. Sporangiferous receptacle marginal, trans- 
versely continued in the axis of a linear, marginal indusium, con- 
stituting a linear, continuous or interrupted sorus. 
* Vernation fasciculate. 
1. Xa. gran difolia, Presl. Pteris grandifolia, Linn. ; Plum. Fil. 
t. 105 ; Schk. Fil. t. 89. — Tropical America. 
2. Xa. denticulata, Presl. Pteris denticulata, Sw. ; Hoolc. et 
Girev. Ic. Fil. t. 28. Pteris Brasiliensis, Radd. Fil. Bras, 
t. 68 bis. — Brazil. 
3. Xa. leptophylla, J. Sm. Pteris leptophylla, Sw. Pteris spi- 
nulosa, Radd. Fil. Bras. t. 70. Cheilanthes spinulosa, 
Link) in Hort. Berol. — Brazil. 
4. Xa. polita, J. Sm. Pteris polita, Link. — Brazil. 
5. la. macroptera, J. Sm. Pteris macroptera, Link. — Brazil. 
6. Xa. biaurita, J. Sm. Pteris biaurita, Linn. ; Plum. Fil. 1. 15. 
Campteria biaurita, Hook. Gen. Fil. t. 65 A. Pteris ne- 
moralis, Willd. ; Wall, in part. — West Indies. 
7. Xa. tripartita, J. Sm. Pteris tripartita, Sw. ? Pteris linearis, 
Poir. ? Pteris intermedia, Blume. — East Indies, Java. 
## Vernation uniserial , distant , sarmentose. 
8. Xa. vespertilionis, Presl. Pteris vespertihonis, Labill. Nov. 
Holl. t. 245. — Tropics and South Temperate Regions. 
56. XaONCHITIS, Linn. 
Vernation fasciculate, erect, subarboreous. Fronds bi-tripin- 
nate, villose, 2-6 feet long, the ultimate pinnae sinuose-pinnatifid. 
Veins costaeform, pinnate; venules anastomosing, forming irre- 
gular, hexagonoid areoles. Sporangia produced on the apex of 
4-5 venules, converging in the sinus of the laciniae, forming an 
arcuate sorus in each sinus. Indusium linear, lunulate. 
1. Xa. aurita, Linn. ; Plum. Fil. t. 17. — Tropical America. 
Sect. III. BLECimEJE. 
Sori medial or costal, transversely elongated. Lndusium plane 
