TAB. CCXXXVIII. 
DAVALLIA BIFID A. / 
FILICES.—GvnATx. Br. Porvropraczm. Kaulf. Firrcrs vere. Willd., Spreng. 
Gzs. Cuan. DAVALLLA, Sm. Sori subrotundi (vel in lineola verticali) margini plerumque 
approximati. Znvolucrum superficiarium, ex apice venz unice ortum, lateribus vel lata basi 
adnatum, exterius et verticaliter liberum. Zr. 
DavaLLiaA bifida; frondibus late ovatis tripinnatis pinnulis bifidis seu bipartitis laciniis elongato- 
cuneatis tenui-membranaceis uninerviis truncatis apice erosis, stipite tetragono, involucris 
transversalibus integris infra apicem laciniarum. 
Davallia bifida. Kaulf. Enum. Fl. p.222. Spreng. Syst. F'eget. v. 4. p. 121. 
Lindszea virescens. —** Swartz," (fide Spreng). 
Has. Brasil, Chamisso; ubi etiam in provincia * Minas Geraes" legit et communicavit C/. 
Lanssdorff. 
Radix fibrosa; fibris crassiusculis, rigidis, flexuosis, atro-fuscis, subramosis. 
Stipites subspithamsei, erecti, graciles, tetragoni, intense fusco-purpurei. 
Frons circumscriptione lato-ovata, acuminata, tripinnata; pinnis primariis secundariisque ovato-lanceolatis, tenui- 
membranaceis, siccitate etiam leete viridibus, glaberrimis. |. Pinnule bifidee, seu plerumque bipartitze ; laciniis 
elongato-cuneatis, apice erosis. ZiacAis primaria secundariaque graciles, fusce, glabrse, nitidee, hinc pro- 
funde sulcatze, w/ima seu partialis alata. 
Sori in laciniis pinnularum, paulo infra apicem inserti, nervum terminantes, transversim oblongi. 
Involucrum tenui-membranaceum, lata basi affixum. 
Capsule numerosse, globosze, lato-annulatze, longe pedicellatee. 
Semina subtriangularia, pallide flavo-fusca, pellucida. 
Fig. 1. Portio pinnz. f. 2. Apexlacinie cum soro. f.3. Capsule. f. 4. Semina:—magn. auct. 
The only specimens we have seen of this DDavallia we received from M. de Langsdorff, who 
gathered them in the remote province of Minas Geraes in Brazil. Its characters are well defined 
by Kaulfuss under the name of Davallia bifida, and he points out some of the marks by which it 
is best distinguished from D. tenuifolia : he has, however, omitted to notice that it is much smaller, 
of a more delicate and pellucid texture, and of a pale-green colour. The lacini& are broader, 
especially towards the extremity, and the sorus is inserted not close to the extremity, but at a 
distance from it. It is possible that Chamisso's specimens, described by Kaulfuss, came from 
Minas Geraes, for it does not appear to be a native of Rio. 
