Piare УІ 
THE LIMESTONE POLYPODY (Pornyropmw овкктахим). 
POLY PODIUM, Linnaeus. 
Clusters of Spore-cases eireular, without covers, growing from the back of the veins, 
7 growing n 
terminal, or nearly so. Veins disunited at 
heir extremities, their branches 
(renules) simple, forked or rarely pinnate 
P. Вовкаттактм, fronds erect, rigid 
branches (or pinnao) bipinnate, stalked, their pinnulets (or lobulets) oblong obtuse 
erenate or nearly entire ; the r 
andulose, pontangular, deltoid, subternate ; lower 
sessile ; stipes glandulose 
EXPLANATION OF JHE PLATE. 
Rh 
creeping extensively, branched, thicker than а straw, dark-bn 
wn, sealy, Seales pale 
brown, semitransparent, lanceolate. Fives dark-brown, branched, clothed with a brighter brown 
cobwebby pubescence 
nt when young, becoming stift 
and erect, abundantly s 
ly about the base, and with a few scattered deciduous scales upwards when 
ing, minutely glandular, pale watery-green, dulled by the glandulosity of the surface; lateral to the 
rhizome, distinct, adherent, Rachie glandulose, the part formi 
stalk to the lower pinnæ much 
shorter, and distinctly smaller, than that between the first and second pairs of pinnae 
Vernation cireinate ; the pinnules ro 
ap separately into little globules, the pinnas then rolled cach 
separate inwards towards the main rachis, which is next itself coiled up. 
Fronds six to eighteen. inches in he 
ight, including the stipes, whieh is usually more than half 
Is at least, of the length ; егесі, of a firm herbaceous texture, deep dull grayish 
von, glandulose, deltoidly-pentangular, but with the pentage 
less manifest than in P. Dryopteris, in 
consequence of the less comparative length of the stalks of the lower pinna. The fronds are not tr 
hem а subternate appearance; they are 
