rOLYPODIACE,®— ACROSTICHE.i;. 
4S 
st-jvo species, a native of New Ilolland and the Malayan Islands. Sterile fronds sessile, reniform, round or 
elongated, ascending, two to two and a half feet high, the upper portion dividing into many broad blunt segments 
permanent, elevated, spongy, and depressed. Fertile fronds simple, two to three times divided, horizontal and 
pendulous, thick and coriaceous, two and a half or three feet long, widening upwards, articulated on a short 
rhizome. Sori in a large irregularly triangular patch, adjacent to the sinus of the first fmxation of the fronds. 
XXIX. CYETOGONIUM, J. Smith. 
Son amorphous, universal on the under side of the contracted fertile fronds, or sometimes crowded 
on the venules. Veins pinnate ; venules arcuately or angularly anastomosing, producing from their 
exterior sides or angles of meeting, one or more excurrent 
free or irregularly anastomosing veinlets. Fronds pinnate, 
from one to two feet long. Rhizome creeping. — Named from 
kyrtos, curved, and gonu, the knee ; in allusion to the peculiar 
knee- bent curve of the venules. 
The aspect of the species of Cyrtogonium varies but little 
from that of Gymnoptcris ; the principal distinguishing cha- 
racter, is their more simple anastomosing venation. Fig. 30 
represents the base of a pinna of the sterile, and a pinna of the 
fertile fronds of Cyrtogonium JlagelKferum (nat. size). 
1. C. m-VGELLIFERUJI, J. (xiCROSTICHUM, WalUch ; HeTERO- 
XEUROX HBTEUOCLITOX, Fee ; PCECILOPTERIS HETEROCLITA, Presl). 
A proliferous, free -growing, evergreen stove Fern, from the East 
Indies. Sterile fronds glabrous, rather membranous, pinnate, from 
one and a half to two and a half feet long ; pinnae petiolate, ovate or 
oblong-acuminate, undulated, the terminal one a foot or more long, 
narrowing upwards, and proliferous near the apex. Fertile fronds 
contracted, erect, pinnate, from one to one and a half foot high; 
pinnae oblong-acuminate, petiolate, the terminal one narrow and 
elongate. Both forms are lateral, adherent to a creeping rhizome. 
2. C. REPANDTJM, J. Smith (Acrostichusi, Flume; Campium, 
Presl ; Hbteroneuron, Fee). — Aglabrous evergreen stove Fern, from 
the East Indies and Java. Sterile fronds slender, reclining, trian- 
gular-elongate, pinnate, one and a half to two feet long, membranous, 
bright green ; pinnae proliferous, repand, ovate-acuminate, petiolate, 
deeply crenate, or slightly lobed, undulate, the terminal one sinuose, 
elongate. Fertile fronds erect, pinnate ; pinnae oblong-acuminate, 
and petiolate. Stipes with a few scattered scales. Both sterile 
and fertile fronds are lateral, adherent to a creeping rhizome. This 
species has been recently introduced by Messi’s. Eollisson, of Tooting, 
from Java. 
3. C. cPvisPA'rtjLUM, J. Smith (Acrostichvji, IFallich). — A very handsome evergreen stove Fern, from 
Ceylon. Fronds rather erect, somewhat lanceolate, broad at the base, acuminate, pinnate, one to two feet 
long, deep green ; pinnae linear-acuminate, petiolate, glabrous, undulated, the margin crenate, with a row of 
spiuulose teeth, one to each marginal sinus. Fertile fronds erect, pinnate, one foot high ; pinnae narrow, and 
petiolate. Both forms are lateral, with a scaly stipes, adherent to a creeping, scaly rhizome. 
XXX. GYMNOPTEItlS, Bernhardi. 
Sori amorphous, denselj' covering some portion or the whole of the fertile pinnae. Ferns pinnate; 
venules compoundly anastomosing, producing variously directed straight or curved free veinlets, 
terminating in the areoles. Fronds simple or pinnate, from one to three feet long. Rhizome 
creeping. — Named from gyninos, naked, and pteris, a fern ; alluding to the exposed fertile 
fronds. 
