I
162 T R IC H O .M A N E S P Y X ID I E E R U M .
The fronds oblong-ovate, bi-tiipinnatiiid, membranaceous,
shining, and almost transparent; segments linear, firm, fiat,
smooth, and entire, the apices frequently emarginate.
Stipes -winged. L ength of frond fro m three to six inches.
Involucres solitary, subcylindrical, the base attenuated, axillary,
wholly buried in the segment; mouth broadly concave, scarcely
two-lipped; the receptacles filiform, of great length, and
considerably exserted.
Requires a rather close humid atmosphere, with a temperature
varying between 55° and 75°.
There are several varieties more divided than in the normal
form; in one tbe segments are crowded, and in another they
are broader.
My obligations are tendered to Mr. Smith, of Kew, for fronds.
Mature fertile Fronds, n a tu ra l size.
TRICHOMANES PUSILLUM.
S w a r t z . H e d w ig . W il l d e n o w . H o o k e r .
Didymoglossum pusillum, D e s v a u x .
Tnchomanes—From the Greek, soft hair. Pusillum—Small.
T i l e species is allied to Tnchomanes muscoides, b u t is smaller
in size, being, in fact, a very minute F en i, creeping on the
stems of palms and other exotic plants.
Native of Jamaica and Trinidad.
The fronds, which are erect, are somewhat cuneate, narrowing
into a brief stipes; they are sub-bipinnatifido-lobate, costate,
and crowded together.
Caudex creeping and tomentose.
Veins dicbotomous and snbpinnated. Margins having stellated
hairs.
Involucres two-lipped, h a lf buried in the lobe, cylindrical
and narrowing; exserted slightly.
Cultivation in a damp atmosphere, with a temperature ranging
between 55° and 75°.
My thanks are due to Mr. Sim, Curator of the Royal
Gardens, Kew, for plants.