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resembles D. ampla, and the indusiate sori (indusia small and fugacious) and the 
non adnate posterior basal segments are characters that seem to prove its alliance 
with D. ampla, but the longer hairs and the few scales are, however, very similar 
to a species such as D. crenulans, which no doubt is a near ally of D. villosa. It must 
also be remembered that no species of the ampla-group has been recorded from 
South Brazil, where a series of species belonging to the subincisa-villosa-group occur, 
some of which in certain characters are rather like D. adenopteris. 1, therefore, find 
it, convenient to place the species in this group. In some specimens the lobes are 
recurved over the sori, reminding one of Hypolepis, species of which have a certain 
resemblance to our species. 
I have seen a good many specimens from three collections; they are all fully 
alike with the only exception that the type-specimens are, as it seems, exindusiate, 
while the others have very minute, setose indusia. 
South Brazil: Rio Grande do. Sul: Silveira Martins, Val Veneta, ad terram silvz primeve, Linp- 
MAN nr. A. 1313 (CC, L, Rg, S, U, W); Munic. Rio Pardo, Fac. Soledade, C. Jiinauns ed. Ros. 
Fil. austrobras. exsic. nr. 207 (B, R, W). 
Argentina: Prov. de Tucuman, Capital Yerba Buena, L. Castillon (BB). 
343. Dryopteris hirtula (Kze.) C. Chr. Ind. Fil. 270. 1905. 
Syn. Polypodium hirtulum Kunze in Steud. Nomencl. 2: 341. 1824 (nomen). 
Polypodium hirsutum Sw. Vet. Akad. Handl. 1817: 61: Bak. Fl. bras. 12: 503 
tab. 64 fig. 1. 
Polypodium lasiernos Spr. Syst. 4: 61. 1827. 
Phegopteris lasiernos Mett, Phegopt. n. 58. 1858. 
Polypodium myriotrichum Bak. Journ. Bot. 1885: 217. 
Type from Brazil, leg, FREyREIS (S!). 
A well-known, smaller, xerophilous species from the plateaus of Brazil, totally 
different from all other Brazilian species, but I should think it is in some way related 
to D. Karsteniana, although its position in the genus is problematical. The long, 
pale-yellow, thin, lanceolate, hair-pointed basal scales with long-fimbriated edges are 
quite unique. The very dense woolly pubescence of the whole frond, especially of 
the stipe and rachises consists of thin, flexible, pluricellular, pale hairs, of the stipe 
and lower part of the rachis, sometimes also of the coste beneath intermixed with 
linear-lanceolate, pale scales. Sori with many similar hairs between the sporangia. 
The lanceolate lamina that reaches 50 cm in length by 25 cm wide at the middle, 
though often much smaller is tripinnatifid with the basal pinne somewhat reduced, 
equal-sided and much reflexed. P. myriotrichum Bak. is a large form with not so 
deeply cut secondary pinnules, 
Brazil, Freyrets (H, S); Minas Geraes, Guaziou nr. 15734 (B, H, Kew) 20157 (B), Itaculumi, Damazro 
nr. 1785 (R). 
