Prates X. ХІ. 
THE COMMON PRICKLY SHIELD FERN 
(PoLysticHum ACULEATUN). 
TICHUM, Roth. Schott. 
ves cireular, medial, rar 
ale. Indusium orbieular, peltate, 
terminal on the venules, covered by an 
indusium or membrana ched 
les 
à each fascicle 
ог near its centre, the margin becoming free. Veins pinnato-fu 
direct, disunited at their extremities, the lower 
parts of the frond bearing a sorus. 
on the fertil 
bipinnate, lanceolate or broad linear-lanceolate, rigid; pinnules 
hed by their wedge 1 base, or obliquely decurrent, or 
Ног basal ones larg 
P. ACULEATU: fron 
distinet, and 
confluent 
fra-medial 
prickly serrate ; soi 
Эму, ші. 
Aroca sonaron, 5 
Var, товатом: fronds narrow-lance 
ones) elliptic, not auricled, nearly all decurrent or confluent, prickly-s 
ate, very rigid ; pinnules (except 
атом: A, fron N " TT —— 
