Piare ХХІ. 
THE NARROW PRICKLY-TOOTHED BUCKLER FERN 
(LASTREA SPINULOSA). 
LASTREA, Presl. 
= eirenlar, medial or subterminal on the venules, covered by an 
anous scale, Гай arly 
ied by the sinus or notch, the margin 
becoming free. Veins simple, forked, or pinnate; venules direct, 
their extremities. 
m reniform, ie, more or less reg 
posterior notch 
mited at 
L.srisurosa: fronds ereet, narrow obl 
g-lanceolate, bipi 
ate; pinne elongate 
ate or pinnatifid with 
aristately toothed lobes; posterior basal pinnules of the lower pinnae much 
gular, oblique ; pinnules oblo 
larger than the anterior ones: seales of the stipes few, ovate, pallid; indusium 
under Pato XIX] 
Candes stoutish, decumbent or slowly creeping in an horizontal direction, witi 
the frond: 
erect from its apex ; branched, sometimes more or less tufted, slightly sealy, formed of the enlarged and 
ases of the decayed fi ding 
roody axis, Seales resembling those of the stipes. 
branched, dark 
minal and adherent to the caudex, nearly as long as the leafy part of the frond, stoutish, 
own-purple at the base ; sparsely scaly, with broad-ovate membranous pale-brown scales of 
