u 
POLYPODIACEjE — ACPOSTIC nEiE. 
ovate or oblong, lanceolate, sessile, acute or acuminate at the apex, obtusely cuneate at the base, entire on the 
margin, and articulated with the raehis. Fertile fronds glabrous, pinnate, about a foot long; pinnoB linear- 
lanceolate, the terminal one elongate. Fronds lateral, adherent to a scandent rhizome. 
3. S. soRBiroLiA, J. Smith (Aciiosticiium, Linnams ). — A dwarf evergreen scandent stove Fern, from Jamaica. 
Sterile fronds glabrous, lanceolate, pinnate, about a foot long, with ovate or oblong acuminate, undulated, coria- 
ceous, shining, bright green pinnte, which are obtusely cuneate at the base, and articulated with a winged raehis. 
Fertile fronds erect, one foot high, pinnate, the pinn® entire and articulate with the raehis. Both are lateral, 
adherent to a scaly creeping rhizome, about the size of a goosc-quill. 
XXIII. POLYBOTRYA, TIumholdt and Botiphnid. 
Soyi amorphous, occupjdng one or both 
sides of the spiciform segments of the con- 
tracted fertile frond. JhfMS pinnate ; venules 
simple, free, external. Fronds bi-tripinnate. 
Rhizome creeping. — Named fromijo/ys, manj', 
and hotri/s, a raceme ; alluding to the appear- 
ance of the fertile frond. 
This genus, in habit and venation, is 
similar to Stenoclilama, but is separated 
chiefly on account of the formation of the 
fertile fronds. From FlapJioc/lossum it is 
distinct in habit, although somewhat analo- 
gous in venation ; distingvdshable, liowever, 
by the veins being external, those of Elapho- 
ylossimi being internal. There are many 
species of Polyhotrya, all tropical ; but one 
only is in cultivation. Fig. 24 represents a 
pinnule of the sterile frond, and the upper 
portion of the fertile frond, of Polyhotrya 
cylindrica. 
1. P. CYLINDMCA, KmdfuSS (P. SPECIOSA, 
Schott).— A rather coarse-lookiug scandent ever- 
green stove Fern, from Jamaica and South Ame- 
rica. Sterile fronds glabrous, triangularly elon- 
gate, bi-tripinnate, from two to three feet long, 
bright shining green ; pinnules oblong-acuminate, 
pinnatifid, truncate at the base, with obtuse seg- 
ments, the one next the raehis largest on the upper 
side, and crenately-serrate on the margin. Fertile 
fronds contracted, of the same form as the sterile, 
bi-tripinnate, from one to two feet long, and sporan- 
giferous throughout, with the segments cylindrical, 
rhizome. 
Sect. SvMpi.oPHi.EEiE.1;, J. Smith. — Veins netted, or variously anastomosing. 
XXIV. OLFERSIA, Rnddi. 
Sort amorphous, densely covering the segments of the fertile frond throughout. Veins forked, 
parallel, internal, their apices combined by a transverse continuous marginal vein. Frmicls pinnate. 
Rhizome creeping.- — Name probably commemorative of Olfers, which is the name of a German writer, 
but we do not find it explained. 
Of this very elegant genus only one species is known. The venation is not very readily seen in the 
fertile fronds, in consequence of its being contracted and sporangiferous on both sides ; but in the 
