54 P O T .y P O D IU J I C U S P ID A T U M .
b rig h t shining green; length of pinnæ from six to eight inches.
Sori circular, uniserial, at first minute and white, eventually
becoming v ery large, and orange-yellow in colour. About
thirty -six pairs of sori on each pinna, and raising slight
umbones on the up p e r surface.
Fro n d s lateral, being a rticulated on a very thick, creeping,
smooth, branched rhizoma, b rig h t g reen in colour, scattered
over with large brown scales. Rhizoma about two inches and
a h a lf in circumference.
In tro d u c ed into the Royal Gardens, Kew, in the year 1844,
by Air. Jo h n Cristie.
Stipes pale green on u p p e r side, rich brown below, the two
colours being divided b y a narrow b e lt of pale green.
The fronds stand nearly erect, whilst the pinnæ are pendulous.
The width of the frond is the same, except near th e apex,
where it becomes narrower.
The plant in my collection has fronds four feet in length;
W’ith pinnæ th irte en inches long, and not an inch wide in the
broadest part. Tbe stipes about fourteen inches in length.
This F e rn , although by no means in general cultivation, is
best Itnown u n d e r the name of D r yn a ria leiorhiza.
Aly obligations are due to Alessrs. Rollisson, of Tooting, for
a plant of Polypodium cuspidatum ; and to Alessrs. Booth and
Sons, of H am b u rg ; Air. H en derson, of AVentworth; Air.
Aloore, of the Chelsea Botanic G ardens; and Air. Norman,
of H u ll, for fronds.
I t can be p rocured of Alessrs. Rollisson, of Tooting, and
Air. R. Sim, of F o o t’s C ray ; and th e ir Catalogues appear to
be the only ones which contain this F e rn .
The illustration is from a plan t in my own collection.