THE GENERA AND SPECIES OF CULTIVATED FERNS. 231 W)* 
of this genus, as pointed out by Swartz, holds good to a greater or less extent throughout all the species here 
enumerated ; yet there are several of them with only one double or binate sorus, which occupies the lower ex- 
terior venule; many of the pinnae often have all their sori simple. Diplaziuni thus gradually merges into Asple- 
nium, although, in regard to the sori, its nearest affinity is with Callipteris, from which it can only be distin- 
guished by the latter having an anastomosing venation. Fig. 47 represents a frond of D. plantagineum (med. size). 
1. D. plantagineum, Swartz. — A dwarf evergreen stove Fern, native of Brazil and the West Indies. Fronds 
simple, glabrous, about a foot long, deep green, rather ovate or oblong acuminate, undulate, proliferous at the 
base, crenatc-serrate at the margin. Stipes with a few scales near the base. Fronds nearly all fertile through- 
out ; terminal, adherent to an erect fasciculate rhizome. 
2. D. jiujlandifoliam, Swartz. — A handsome evergreen stove species, native of Tropical America. Fronds 
lanceolate, pinnate, from three to five feet long, bright green, glabrous throughout; pinna; large oblong-ovate, 
acuminate, somewhat round or truncate-cuneate at the base, slightly crenate-serrate at the margin ; inferior 
petiolulate, superior sub-petiolate. Fronds terminal, adherent to a thick erect rhizome. 
3. D. sijlraticum, J. H. — An ornamental evergreen stove Fern, from Ceylon. Fronds broadly lanceolate, 
glabrous, pinnate, two to three feet long, deep green ; pinna; linear, narrow, acuminate, often ten inches long, 
petiolulate, sub-cordate at the base, obtusely crenate or slightly pinnatifid, with round obtuse serrate segments. 
Stipes scattered over with dark scales ; terminal, adherent to a fasciculate erect rhizome. 
4. I). Slicjiherdi, Presl (Asplenium ambiguum, Ilort). — A beautiful evergreen stove Fern, native of Brazil, 
Jamaica, and other "West India Islands. Fronds glabrous, somewhat ovate acuminate, pinnate, one and a half 
foot long, bright green ; pinnae ovate-lanceolate, cuspidate, inferior ones petiolulate, superior sub-sessile, pinna- 
tifid, truneate-cuncato at the base, with oblong-obtuse blunt dentate segments. Fronds terminal, adherent to an 
erect fasciculate rhizome. 
5. D. coarctation, Link. — A glabrous evergreen stove species, from Brazil. Fronds lanceolate, one and a half 
foot long, pinnate, deep green ; pinna; oblong-obtuse, acute, lower ones petiolate, sub-bipartite, auriculate on the 
superior base, inferior obliquely truncate, margin serrate. Stipes scaly near the base ; terminal, adherent to an 
erect rhizome. In some stages this is not very distinct from the subsequent one ; but is known by the pinna? 
being broader, more closely set on the rachis, and less divided. 
6. D. Otites, J. H. (Asplenium Otites, Link; A. bipartitum, WUhUnow; Ilort. Brit.) — A glabrous evergreen 
stove Fern, from Brazil. Fronds slender lanceolate, one to one and a half foot long, pinnate, bright green ; 
pinna; oblong, acute or acuminate, inferior ones bipartite, sometimes sub-bipinnate, petiolate, superior auriculate, 
truncate-cuneate at the base, margin iuciscd serrate. Stipes scaly near the base ; terminal, adherent to an erect 
rhizome. 
7. It. decussation, J. Smith (Asplenium decussatum, WallicK). — A very coarse free-growing evergreen stove 
Fern, from Nepal. Fronds rather ovate-lanceolate, pubescent, two to two and a half feet long, dull green, 
pinnate ; pinna; lanceolate, petiolulate, sub-cordate at the base, deeply pinnatifid with oblong-obtuse rounded 
crenate segments, lower ones distant. Stipes and rachis dark coloured. Indusium fringed on the margin. 
Fronds terminal, adherent to a slender creeping rhizome. 
8. I). l/tctt/ptcroidi'S, Presl (Asplenium thelypteroidcs, Michaiu:). — A rather coarse-looking hardy deciduous 
Fern, from North America. Fronds lanceolate, pinnate, two feet long, dull green, and scattered over beneath 
with narrow scaly hairs; pinna; lanceolate, sub-sessile, deeply pinnatifid, with oblong segments rounded at the 
apex, ereuately senate at the margin. Stipes scaly at the base; terminal, adherent to a thick ere. ping rhizome. 
Some fronds in this species have their sori all simple, similar to an Asplenium. Indusium vaulted, and dentate 
mi the margin. 
9. It. arborescens, Swartz. — An ornamental evergreen warm greenhouse species, from St. LTelena. Fronds 
glabrous, rather ovate-lanceolate, three feet long, light green, bipinnate below, above bipinnatifid ; pinna; lance- 
olate ; segments oblong-obtuse rounded at the apex, and serrate at the margin. Rachis and stipes scaly ; ter- 
minal, adherent to an erect rhizome. 
10. I), striatum, Presl (Asplenium striatum, Liiinaitx). — A large-growing evergreen stove Fern, from Jamaica. 
Fronds bipinnate, three to five feet long, light green ; pinna; lanceolate, a foot or more long ; pinnules oblong- 
acuminate, sub-cordate at the base, with roundish obtuse dentate segments. Rachis, midrib of pinna;, ami pin- 
nules, pubescent. Stipes scaly at the base ; terminal, adherent to au erect rhizome, attaining the height of a 
foot or more. 
11. Ik sui-alalum, l;. Howard SIS. — An ornamental evergreen stove Fern, native of Venezuela, Brazil, 
and other tropical pails of America. Fronds glabrous, bipinnatifid, aub-tripinnatifid below, light given, three to 
five feet long; pinnules lanceolate, petiolate, deeply pinnatifid, cordate al the base, vt iih oblong-obtuse segments, 
broad at the apex, and serrate at the margin. Rachis, midrib of pinna), and pinnules i hanneled. Fronds terminal, 
adherent to an erect rhizome, attaining the height of two feet. 
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