MAXON—STUDIES OF TROPICAL AMERICAN FERNS. 553 
19. Polypodium truncicola Klotzsch, Linnaea 20: 374, 1847. 
TYPE LOCALITY: Tovar, Venezuela (Moritz 252). 
DISTRIBUTION : Venezuela to Ecuador. Ascribed also to Guatemala, probably 
in error. 
Of this species, which is tolerably well known from its redescription by Met- 
tenius and others, the following specimens are in the U. 8. National Herbarium: 
VENEZUELA: Mérida or Tovar, Moritz 333. Without locality, Fendler 211. 
20. Polypodium nanum Fée, Gen. Fil. 238. 1852. 
Polypodium exiguum Fée, Crypt. Vase. Brés. 1:89. 1869, not Heward, 1838, 
nor Griseb. 1864. 
Polypodium blanchetii C, Chr, Bot. Tidsskr, 25: 78, 1902. 
TYPE LOCALITY: French Guiana (Leprieur). 
DISTRIBUTION: French Guiana, British Guiana, and Brazil. 
ILLUSTRATION: Fée, Crypt. Vase. Brés. 1: pl. 37. f. 1 (as P. exiguum Fée). 
In his recent paper upon this group Hieronymus* has referred to this species 
specimens of five different collections, two of which (Malme 1696 and Glaziou 
15753) are represented in the U. S. National Herbarium. <A study of these and 
of several of Leprieur’s French Guiana plants, also in the National Herbarium, 
shows all to belong to a single species, as stated by Hieronymus. 
Of the two other collections (not seen) one (Schwacke 5001) was determined 
by Christ as P. eriguum Fée, a “species” described and figured by Fée from a 
plant from Bahia (Blanchet 8). Hieronymus regards this as distinct from 
P. nanum and Christ’s determination, therefore, as an error; but there is little 
to support such a view. The Leprieur specimens at hand are exactly similar to 
Fée’s figure, save in the one particular of lacking the long stipes shown in that 
illustration; and it is probable that the specimen figured was either atypical or 
imperfect, or both. Moreover, Christensen in substituting the new name 
P. blanchetii for the P. exiguum of Fée has cited two of Glaziou’s Brazilian 
plants (10177 and 15753), the latter of which is included by Hieronymus under 
P. nanum. An example of this number in the National Herbarium, received 
from Copenhagen under Christensen’s determination as P. blanchetit C. Chr., 
agrees very well with the Leprieur plants and serves to indicate that what- 
ever Blanchet’s no. 8 (the type of P. blanchetii) may be, P. blanchetii as under- 
stood by Christensen is conspecific with P. nanwm. Glaziou’s 10177 has not been 
seen by the writer nor, apparently, by Hieronymus. 
The specimens mentioned as being in the U. S. National Herbarium are: 
FRENCH GUIANA: Summo arborum muscis intermixtum in sylvis humidis, 
Oyapok superius, June, 1833, Leprieur (as Polypodium trichomanoides). 
Brazit: Serra da Chapada, Matto Grosso, June 18, 1894, Malme 1696. 
Without exact locality, Glaziou 15758. 
There are excellent British Guiana specimens of this species in the Underwood 
Herbarium, collected by Jenman in the region of the higher Demerara River. 
21. Polypodium daguense Hieron. Bot. Jahrb. Engler 34: 504, 1904. 
TYPE LOCALITY : Dense maritime forest near the Rio Dagua, Province of Cauca, 
Colombia (Lehmann 1951). 
DISTRIBUTION : Known only from the type collection. 
The present species was described by Hieronymus previous to his revision 
of this group in 1905. It is distinguished easily from P. nanum by the char- 
acters stated in the key, and from P. taenifolium, its nearest relative, by the 
lesser size of all its leafy parts, by its shorter sete, and by having the veins of 
the fertile segments forked toward the middle rather than near the base. 
*Hedwigia 44: 102, 103. 1905. 
