432 GENERA OF FERNS. 
Species. H. diversifrons, Bory. (Trichomanes elegans, 
Rudge, (in part.) 
Ilust. Rudge Icon. Pl. Guian. t. 35. (bad.) Hook. Gen. fil. t. 
108 
Obs. This is a very rare Fern, originally found in Guiana, 
and more recently near Panama, and also in the island of 
Gorgona on the Western coast of South America, where it 
was found in abundance by Mr. G. Barclay. It should be 
remarked that Mr. Rudge has formed his figure from part of 
this species and part of Trichomanes spicatum. 
111. HYMENOPHYLLUM, Sm. 
Veins simple or forked ; venules direct; sori globose or ver- 
tically oblong ; indusium urceolate-bilabiate ; sporangia sessile, 
seated round a columnar included receptacle. 
Small, and generally moss-like ferns, having the habit of 
Trichomanes, but differing in the indusium being bilabiate, 
and including the whole of the sporangiferous receptacle. 
Ezamp. l. H. cruentum, Cav. 2. H. Tunbridgense, Sm. 
3. H. sanguinolentum, Sw. 4. H. polyanthos, Sw. 5. 
dilatatum, Sw. 6. H. sericeum, Sw. 7. H. hirsutum, Sw. 
8. H. plumosum, Kauf. 
Illust. Hook. et Bauer, Gen. Fil. t. 32. 
Obs. The short included receptacle is the only point 
that distinguishes this genus from Trichomanes, but which is 
a character not always decisive; for, as in other extensive 
allied genera, species are found to form transitions from the 
one genus to the other. 
Sect. IV. DicksoNrz, J. Sm, 
Sporangia pedicellate, spreading, produced from a round 
terminal receptacle, included within a concave, bilabiate, or 
calyciform, reflexed cyst, which is formed by the connivence 
the special indusium with the indusiiform crenules of the 
margin. 
112. SAccoLoua, Kaulf. 
Veins simple, rarely forked, direct, parallel, their apices 
