THE GENERA AND SPECIES OF CULTIVATED FERNS. 
141 
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round at the apex, deflexed, and entire on the margin. Fertile fronds^very slender, two feet or more long, 
fertile on the upper part only, the fertile pinnae paniculate, with linear segments. Eachis and stipes light brown ; 
lateral, adherent to a slender creeping rhizome. 
2. I.flexuosum , Swartz, (Hydroglossum, Willdenow). —A beautiful evergreen stove species, a native of the 
East Indies and China. Fronds twining, from twelve to twenty feet high. Sterile pinnae conjugate, palmate, 
five or six lobed, bright shining green; segments lanceolate, nine to eighteen inches long, entire on the margin, 
and gradually increasing in size upwards. Fertile pinnae small, conjugately bipartite, and near the apex of the 
fronds, which are lateral or subterminal, adherent to a caespitose, decumbent, short rhizome. The plant is known 
in gardens as L. circinatum. 
3. L. articulatum, A. Eichard.—An ornamental evergreen greenhouse Fern, from New Zealand. Fronds 
glabrous, scandent, four to six feet high; pinnae conjugate, pinnate ; pinnules, lanceolate, yellowish green above, 
glaucous beneath, obtuse at the apex, the margin entire, cuneate at the base, and articulate with the petiole* 
which is of a reddish brown eolour. Fronds lateral, adherent to a slender creeping rhizome. 
4. A. volubile , Swartz, (Hydroglossum, Willdenow). —An ornamental evergreen stove species, a native of the 
West Indies. Fronds twining, and minutely pubescent, twenty to thirty feet high; pinnae conjugate, pinnate; 
pinnules linear-lanceolate, bright green, four to five inches long, sub-hastate, slightly cordate at the base, finely 
serrated at the margin, and articulate with the rachis. Fertile pinnae near the apex of the fronds; lateral, 
adherent to a caespitose creeping rhizome. This species is known in cultivation under the name of L. semi - 
hastatum. ■ 
5. L. venustum , Swartz, (Hydroglossum hirsutum, Willdenow ).—A very beautiful evergreen stove Fern, a 
native of the tropics of South America. Fronds twining, from eight to twelve feet high, light green, hairy 
throughout; pinnae conjugate, bipinnate; pinnules cordate-palmate, membranous, five to seven-lobed, intermediate 
one very large, lanceolate, inciso-serrate, acute at the apex, and at the base indistinctly articulated with the petiole. 
Fructifications copious on the upper part of the fronds, which are lateral, adherent to a short creeping rhizome. 
6. L. scan dens, Swartz, (Hydroglossum, Willdenow ; L. microphyllum, of gardens). —A deciduous stove Fern, 
from the East Indies and China. Fronds slender, twining, ten to fifteen feet high, minutely pubescent, light 
green; pinnae conjugate, tripinnate; pinnules cordate-palmate, five to seven-lobed, intermediate one elongated, 
linear-lanceolate, and serrate at the margin. Sori abundant 
■on the upper half of the frond, the fertile segments often 
very small. Fronds lateral, adherent to a slender creeping 
rhizome. 
YGODICTYON, J. Smith. (Lygodium, sp., of Authors', 
Hydroglossum, Presl). —Named from lygodes , flexible, 
and dictyon , a net; the plants having a twining habit and a 
reticulated venation. 
Sori on marginal appendices, forming numerous linear 
spikelets, which are composed of two rows of indusiate imbri¬ 
cate cysts, each cyst or cell containing an oval sporangium, 
which is attached by its interior side and resupinate. Veins 
pinnate; venules anastomosing, forming unequal oblong 
areoles. Fronds twining, scandent; pinnse conjugate, lobed, 
or palmate. Ehizome caespitose.—This genus consists of two 
or three species, natives of the Islands of the Pacific and In¬ 
dian Ocean, and South America, which were formerly referred 
to Lygodium, with which they agree in their twining habit 
and conjugate pinnae, and in requiring similar treatment in 
cultivation ; they are only separated on the ground of their 
reticulated venation. Fig. 85 represents a small portion of 
L. heterodoxum (nat. size), with a spikelet (magn.) 
1 L. heterodoxum , J. H., (Lygodium, Kunze). —An orna¬ 
mental, evergreen, warm greenhouse Fern, a native of Guate¬ 
mala and Oaxaca. Fronds slender, twining, from ten to twenty 
feet high; sterile pinnae conjugate, palmate, glabrous, rather 
dull green, five to seven-lobed, cuneate at the base; lobes 
linear-lanceolate, undulated, four to seven inches long, rather 
85. -obtuse at the apex, and serrate at the margin. This Fern was 
introduced to English collections in 1850, from the Continent, and has not yet produced fructification. The fronds 
are terminal, adherent to a short rhizome, which is somewhat tufted. 
CHIZAEA, Smith. —Name derived from schizo , to cleave; the fertile fronds being divided into numerous linear 
segments. 
