206 
FERNS : BRITISH AND FOREIGN, 
106. ONOCLEA, L. 
Vernation uniscrial, distant ; 
sannentum hypogaeous. Sterile 
fronds sub-bipinnatifid ; veins 
reticulated. Fertile fronds 
bipinnate ; veins free ; pinnules 
contracted, sessile; margins 
conniving, forming unilateral 
spikes (pinnae) of globose, bac- 
ciform segments, each com- 
pactly filled with sporangia, 
which rise from four to six 
punctiform, medial receptacles. 
Special indusium lateral, very 
membranous. 
1. O. sensibilis, Lin. ; Schk. 
Fil. t. 102 ; Hook. 
Gen. Fil. t. 82 ; Lowe’s 
Ferns, 6, t. 1. Ono- 
clea obtusiloba, Schk. 
Fil. t. 103. — North 
America. 
<ienus 106.- Pinna of barren frond. No. 1. 
107. LORINSERIA, Presl ; Fee. 
Vernation uniserial, sarmentum hypogseous. 
Fronds distant, sinuose-pinnatifid or subpinnate, 
1-1 5 foot high, the fertile contracted. Veins 
of the sterile frond uniform reticulated ; fertile 
segments rachiform, costal anastomoses trans- 
verse-elongated, sporangiferous. Receptacles 
elongated , medial. Sori linear, contiguous, in 
a costal row. Indusium vaulted, involute, be- Genus 107.— Barren 
. n , pinna, under Mile, 
coining reflexed. No. 1. 
