TAB. CLXIV. 
ACROSTICHUM LANGSDORFII. 
FILICES.—GvnATz. Br.  PorvropnraAcEx. Kaulf.  Fririczms vere. Willd. 
Grzw. Cuag. J4CROSTICHUM, Linn. Sori amorphi, seu Capsule per totam paginam infe- 
riorem frondis (interdum diverse) ad ejus partem sparse.  Jmwolucrum nullum (nisi squa- 
mule vel sete in quibusdam capsulis interstinctze). £r. 
AcnosricHUM Langsdorfü; fronde simplici, sterili lato-, fertili angusto-lanceolata, basi apiceque 
acuta utrinque margine stipiteque dense squamosis, squamis longe ciliatis. 
Has. In Brasilia, Provincia Minas Geraes. | Langsdorff- 
Caudex repens, crassus, squamosus, inferne radicosus; radicibus fibrosis, ramosis, subtomentosis. 
Stipes spithamaeus, dense paleaceo-squamosus; squamis ovatis, acuminatis, margine ubique ciliatis. 
Frons fere exacte lanceolata, coriacea; sterilis spithameea, lato-lanceolata, basi apiceque acuta, costata, utrinque 
margineque squamis late ovatis obscure reticulatis, longe ciliatis, ferrugineis densissime tecta : fzrZilis magis 
angusta, facie superiore, margine costaque inferiore precipue squamosa. 
Capsule faciem superiorem omnino tegentes, costa excepta, subgloboss, sublonge pedicellate, annulo fere com- 
pleto cinctze. : 
Semina oblongo-ovalia, intense fusca. 
Fig.1. Squama stipitis. f.2. Squama frondis. f.3. Capsule. f 4. Semina:—magn. auct. 
Allied to the zderostichum succisefolium from Tristan da Cunha, already figured in this work: 
but distinguished from it by its larger size, more acute base and apex of the frond, and by the 
very different structure of the scales both of the frond and stipes. 
