THE ROYAL BLADDER FERX 
«coloured. except at the base which is brownish ; brittle, slender; terminal and adherent to 
Fr 
ls. Pinna ovate, acute, unequal. Pinnules bluntly 
bipinnate, or almost tripinnate in luxuriant fro 
or sometimes acutely ovate, with a narrow stalk-like attachment, deeply pinnatifid; the lobes linear or 
t distinct erect teeth. which are blunt 
lincar-oblong, blunt, obscurely to 
pointed or retuse, In the larger pinnules the lobes, though still decurrent, and not truly separate, are 
of division, 
distant and almost divided to the rachis, producing almost a tripinnate mo 
Venation of the pinnules con (ish midvein, with alternate lateral branches (reins 
4 into each lobe, and there ching into several eenudes, which terminate in the retuse 
apices of the teeth, and are thus apparently directed towards the marginal sinuses. 
over the back of the fre 
Fructificatiom satte 4. Sori numerous, sometimes crowded, small 
round, medial on the veins, indusiate, Zndusium a small delicate transparent membrane, which is 
ovate acute, slightly jagged in front, attached behind the sori, projected forwards over them, and at 
length reflexed. Spor wate. Spores oblong, echinate. 
Duration. ‘The caudex is perennial, The fronds аго annual, appearing in May and perishing 
in autumn, 
As the plant found at Leyton is generally admitted to be the Polypodium regium of Linnseus, while 
it is certainly also the P. alpinum of Wulfen, it seems proper to adopt, as Presl has done, the older 
specific name. Linnwus’s specimen, however, it must be observed, is unsatisfactory as evidence in 
support of this view. 
‘There is no doubt the plant is distinct from C. fragilis, being analogous in size with the smaller 
forms of that species, but more finely divided. ‘The segments of its pinnules are either narrow-oblong 
or linear, and the teeth are either blunt or more commonly emarginate; the veins very frequently 
terminating in the notch at the apex of the tooth, instead of at the projecting point of the tooth, as in 
C. fragilis 
It is an easily grown plant, either in well-drained pots of free open soil, such as light loam and turfy 
peat with sand; or in good, £ e sheltered situations well drained, and with congenial soil, in open 
rockeries, It is more liable than the allied plants to suffer from damp while at rest in winter, and 
in cultivating it, and 
hence should not bo too much watered at that season, There is no other difficulty 
it is increased with facility by division. 
The 
nts occasionally produce forked fronds, but there is no perm 
ont variety known. 
tyran 
