546 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
1. Polypodium micropteris C. Chr. Ind. Fil. 545. 1906. 
Xiphopteris setosa Kaulf. Enum. Fil. 275, 1824. 
Grammitis sctosa Presl, Tent. Pter. 208. 1836, not Blume, 1828. 
Polypodium setosum Mett. Abh. Senckenb. Ges. Frankfurt 2: 33. 1856, not 
Thunb. 1784, Férst. 1786, nor Presl, 1836. 
TYPE LOCALITY: Brazil. 
DISTRIBUTION: Apparently confined to Brazil. 
ILLUSTRATION: Raddi, Pl. Bras, pl. 22 bis. f. 3, 3a (as Grammitis myo- 
suroides. ) 
The above synonymy shows the change of name made by Christensen to 
have been necessary for this species, which was redescribed by Hieronymus * 
under the previously accepted name Polypodium sctosum Mett. Most of the 
material cited by the latter has been seen in fragments kindly forwarded to 
the writer by Dr. I. Urban. In addition there has been available a single 
specimen in the Underwood Fern Herbarium. 
2. Polypodium limula Christ, Bull. Soc. Bot. Genéve II. 1: 218, 1909. 
PLATE 382. 
TYPE LOCALITY: Marais de la Palma, Costa Rica, altitude 1,500 meters 
(Pittier 708). 
DIsTRIBUTION: Mountains of Panama and Costa Rica, at 700 to 1,650 meters 
altitude; reported also from Guatemala. 
This species, which is the continental analogue of P. hartii, is related closely 
only to that species and P. nutatum. 
The following specimens are in the U. S. National Herbarium: 
Costa Rica: Mossy trunks of trees, La Palma, alt. 1,450 to 1,550 meters, 
Tonduz 12595; Maron 367, 476, 406 in part. La Guaba, San Isidro, 
Jiménez 271. Cafias Gordas, alt. 1,100 meters, Piftier 10976. Forests 
of Tablazo, Pittier 7948 in part. Without locality, Wercklé. Hele- 
chales de General, valley of Diqufs, alt. 700 meters, Pitticr 12060, 
PanaMA: Humid forest along the upper Caldera River, near Camp I, 
Holcomb’s trail, above El Boquete, Chiriquf, alt. 1,450 to 1,650 meters, 
Maron 5721. Above Penonomé, Williams 454, 
EXPLANATION OF PLATE 32,—Specimens of a cotype collection, Pittier 12595 (U. 8. Nat. 
Herb. no. 366022). Natural size. 
3. Polypodium hartii Jenman, Journ. Bot. Brit. & For. 24: 272. 1886. Prater 32. 
TYPE LOCALITY; Jamaica. 
DISTRIBUTION: Jamaica and the Lesser Antilles, ascending to 1,800 meters. 
A well marked species, to be compared only with P. limula and P. nutatwn. 
There is, as Hieronymus has noted, a wide variation in its scales, some of 
which measure a full 3 mm. in length. 
The following specimens are in the U. S. National Herbarium: 
GRENADA: Without locality, Sherring 156 in part. 
GUADELOUPE: “ Epiphyte, assez rare. Chemin des Bains-Jaunes & la 
Savane & Mulets. Savane aux Ananas. Morne Pavillon (Trois- 
Rivieres). Alt. 700-1,080 meters. 1897. 1899.” Duss 4872, 4145, 
Dominica: Trois Pitons, Lloyd 797. 
EXPLANATION OF PLATE 33.—Two collections of Polypodium hartii: a, part of a Grenada 
specimen, Sherring 156 in part, received from Kew; 6, Guadeloupe specimens, Duss 
“4372, 4145” (U. S. Nat. Herb. no. 524164). Both natural size. 
*Hedwigia 44:91, 92. 1905. 
7 Op. cit. 95. 
