Prare XXIX 
THE MARSH, or FEMALE BUCKLER FERN 
(Lastrea THELYPTERIS). 
LASTR 
Clusters of Spore-cases circular, m 
А, Presl. 
dial or subterminal on the venules, covered by an 
indusium, or membranous scale. Zndusinm 
rotundate with a posterior notch ; attached by the sinus or n 
becoming free. Veins simple, forked, or pinnate 
venules direct, disunited at 5 
their extremities, 
L. Tazıyprzans; fronds lanceolate with а brond base, pinnate ; pinna: linear lanceolate 
deeply pinnatifid, the lobes oblong, their margins revolute in the fertile fronds 
which thus appear to have more пеше contracted lobes; caudex ereepin, 
EXPLANATION OF THE PLATE. 
BOOK 
Caudez extensively creeping, branched sparingly, produc 
g fronds at intervals, slender, blackish 
brown, sealy at the growing point, Seales few, pale brown, ovate-lanceolate. Fibres numerous, dark 
brown, much branched, smooth or tomentose 
Stipes as long as or longer than the leafy portion in the f 
ile fronds, less elongated and slighter 
in the barren ; smooth, rounded behind, channelled in front, the base ebony-coloured, pal 
sen upwar 
Rachis also smooth and channelled in front, the secondary rachides bearing a few small seattered 
scales, and loose spreading deciduous hairs ; the latter also appear here and there on the veins beneath 
and along the margins of the lob 
