quite to the midrib, entirely concealing the sporangia, which
are borne on the upper part of the very obscure forking
veinlets.
Plants cultivated in the moister atmosphere of eastern
conservatories have the pinnules less revolute, and sometimes
quite flat and destitute of sporangia. The pinnules have
then much of the roundish-quadrate form seen in Pellæa
Wrightiana, but are considerably smaller, even when, as is
often the case, the fronds are only twice pinnate. Plants of
this kind pass for P. bella among florists, but have probably
little to do with Platyloma bellum of Moore. I am under
obligations to Hon. J . Warren Merrill for a full set of cultivated
forms of this species.
Plate X LV II., p'ig. 7 -10 . — P d lita Ornithopus, drawn from a plant
sent by Mrs. E llwood C o o fek from Santa Barbara. Eig. 8 is a pair
of the secondary pinnæ. Fig. 9, a pinnule. Fig. 10, a spore.
