CHARACTERS OF TRIBES AND GENERA, 289 
_ guished by the venation being reticulated, in that respect 
agreeing with the following genus, Litobrochia. 
The following are the principal well-marked species, all 
of which are natives of the Western hemisphere, except D. 
ludens, which is a native of the Malayan and Philippines, 
and which also differs from the rest of the species in its 
vernation being sarmentose. 
* Vernation uniserial, sarmentose. 
D. ludens ( Wall.) (D. Wallichii, J. Sm., 1841; Bedd. 
F. Brit. Ind., pl. 27). 
** Vernation fasciculate, generally ccespitose. 
D. sagittifolia (Raddi) (v ei: D. lonchophora (Mett.) ; 
D. pedata (Linn.) (v v.); D. palmata (Willd.) (v v.) ; D ` 
collina (Raddi) (v v.) ; D. ornithopus (Mett.) ; D. decipiens 
(Hook.) ; D. decora (Bracken. Fil., t. 13). 
The two latter are natives of the Sandwich ak the 
others are almost confined to Brazil. 
164.—PELLÆOPSIS, J. Sm. 
Pellæa sp., Hook. Sp. Fil. 
Vernation fasciculate, sub-cæspitose. Fronds 6 to 18 
inches or more in length, pinnate or bi-sub-tri-pinnate, firm, 
~ Smooth, castania-ebeneus; pinnæ and pinnules sessile, arti- 
culate with the rachis. Veins anastomosing. Receptacles 
~ transverse, marginal, forming a continuous sorus. Indusiwm 
» narrow. 
Type. Pteris articulata, Kaulf. 
. Oss.-—The two species which constitute this genus, agree 
. in general habit with Pellea, but differ in having reticulate — 
Te venation, which brings them in affinity with Doryopteris, —— 
