578 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
less to be associated as P. monosorum Desv., as Hieronymus, determining the 
application of this name from Mettenius’s notes, has stated.’ 
The following specimens are in the U. 8. National Herbarium: 
Ecuapor: Cerro de Pichincha, Jameson. Without exact locality, Jameson. 
Eastern Cordillera, alt. 3,400 meters, Rimbach (Rosenstock, no. 1). 
“An Biiumen auf dem Nudo de Tiripallo, dem Corazon, dem Pichincha, 
und auf der Montafia Mojanda, 3,000-3,400 m. 24. XII. 1880,” Leh- 
mann 431. Without definite locality, Lehmann 4448, 
DOUBTFUL SPECIES, 
1. POLYPODIUM ATURENSE Maury, Journ. de Bot. 3: 134. f. 3. 1889. 
Described and illustrated upon specimens said to have been collected in 
“bois humides des bords de l’Orénoque, Salvajito, Raudal d’Atures,” by Gaillard 
(no. 111). Judging from the figure this is probably a distinct species, but it 
can hardly be placed definitely without an examination and comparison of the 
original specimens, these being apparently the only ones known. 
2. POLYPODIUM BALLIVIANI Rosenst. Repert. Nov. Sp. Fedde 9: 344. 1911. 
Founded upon specimens collected at Antahuacana, Bolivia, in the valley of 
the Rio Espfritu Santo, altitude 750 meters, June, 1909, by Dr. O. Buchtien 
(no. 2169). Not seen by the writer. According to the ample description it is 
a strongly characterized species of the group of P. plebejum, but not very 
closely related to that species itself. 
3. PoLYPODIUM BUCHTIENII Christ & Rosenst. Repert. Nov. Sp. Fedde 5: 237. 
1908. 
Described from specimens collected at Unduavi, Bolivia, altitude 3,300 meters, 
upon trunks of trees in forests, February 12, 1907, by Dr. O. Buchtien (no. 880). 
Not seen by the writer. Rosenstock contrasts it with P. plebejum, from which 
it is apparently distinct, especially in scale characters. 
4, POLYPODIUM FRASERI Mett.; Kuhn, Linnaea 36: 137. 1869. 
Founded upon Ecuador specimens collected by Fraser; not known to the 
writer. From description a near ally of P. plebeium, but probably well marked 
by the form of the rather large scales of the lamina. 
5. PoLyPoDIUM MASAFUERAE Phil. Linnaea 29: 107. 1857. 
Described briefly from specimens collected by Germain upon Masafuera, one 
of the Juan Fernandez group, belonging to Chile. Hooker? has figured as P. 
macrocarpum (P. pycnocarpum) a Masafuera specimen which agrees fairly 
well with the original description of P. masafwerae and seems to indicate that 
Christensen is correct in listing it as a valid species. 
6. PoLyPopIUM NIGRIPES Hook. Sp. Fil. 5: 17. 1863. 
A peculiar form, described from Venezuela specimens collected by Fendler 
(no. 247), known to the writer only from an imperfect specimen of the original 
collection, in the herbarium of the College of Pharmacy, New York City. Not- 
withstanding its subphlebodioid venation the plant in general appearance and 
in scale characters is clearly allied to the forms grouped at present under P. 
leucosticton, rather than to P. plebejum (to which it is referred by Christen- 
sen). If it is recognized eventually as a distinct species it must be renamed, 
on account of a Javan species having been described as Polypodium nigripes 
in 1844. Kuhn's notes* upon P. nigripes Hook. should not be overlooked. 
* Bot. Jahrb. Engler 34: 523. 1905. 
? Cent. Ferns pl. 34. 1854. 
* Abh. Naturf. Ges. Halle 11:41. 1869, 
