41 93 



and broader: pinnæ up lo 15cm long by 3'/2 — 4cm broad; segments 5mm broad, 

 costæ above and margins excepted quite glabrous, 3) stipe, rachis and costæ 

 beneath rather densely scaly, the scales rigid, nearly black, more or less dentate 

 with a long fibrillose apex, the cell-walls thick and dark (fig. 3 -'^), 4) veins 10—11, 

 more distinct than in the type. 



From D. ctenitis it differs by fewer veins and medial or supramedial sori 

 and by the shorter teeth of the scales. 



Besides the specimens enumerated by Rosenstock (1. c.) I have seen: 



Santa Catharina: Itajahy, E. Ule nr. 190 (RB). 

 Parana: Maréchal Mallett, P. Dusén nr. 30(i8 (C). 

 Minas Geraes: Serra do S. José dEl Rev, A. Sii.veira nr. 358 (C). 



Most specimens referred hereto with doubt by Rosenstock belong to Ü. sub- 

 marginalis. 



33. Dryopteris ctenitis (Link) O. Kt/e. Rev. 2: 812. 1891; C. Chr. Ind. 260. 



Syn. Aspidium ctenitis Link, Hort. Berol. 3: 122. 1833! 



Neptirodium ctenitis Bak. Syn. 265. 1867. 



Lastreu distans Brack. U. S. Expl. Exp. 1«: 192. 1854! 



Aspidium squamigerum Mett. msc. (Bak. Syn. 265 nota)! (non Fée necMann). 



Nepiirodinm squamigerum Rosenst. Hedwigia 43: 224. 1904. 



Aspidinm amanrolepis Fée, Cr. vase. Brés. 1: 137 lai). 44 fig. 2. 1869! 



Aspidium isahellinum Fée, Cr. vase. Brés. 1: 137 lab. 45 fig. 2. 1869! 



Dryopteris isabellina C. Chr. Ind. 272. 1905. 



Nephrodium caripense ß squamigerum Bak. Fl. Bras. 1-: 474. 1870. 

 Link founded this species on plants cultivated in the Botanical Garden of 

 Berlin and the type specimen (B!) belongs to a somewhat abnormal form, wliich 

 after a detailed analysis of the original specimens of each was found to be identical 

 with A. squamigerum Mett. and A. amaurolepis Fée. The species is well figured by 

 FÉE on the plates quoted above. The rudimentary lower pinnæ of A. isahellinum 

 (lab. 45 fig. 2j are not normal ones; in some specimens I have found similar ab- 

 normal pinnæ, which are not always the lower ones; in such pinnæ the lower 

 segments only become fully developed , the cosla suddenly terminating in a 

 scaly bud. 



D. ctenitis is intermediate between D. falciculata and D. submarginalis and il 

 is very difficult to distinguish some of its forms from these species, still I think 

 the following characters mark it sufficiently. 



Leaf as dried dark-brown or red-brown, thin. Rachis clothed with dark and 

 stiff, fibrillose scales with a long hair-like apex, shortly pubescent in the furrows 

 above. Pinnæ rather distant, up to 20 cm long by 3 — 4 cm broad, the edges 

 parallel from the base to above the middle. Costæ beneath more or less sh'ort- 



D. K. D. Vidensk. SelsU. SUr-, 7. Kiekke, n:itui-videiisk. og niatlieni. Al'd. X 2, 



13 



