736 THE FLORA OF NORFOLK ISLAND, 



of the lower pinnre being so very distant (3 to 4 inches), and their nearly 

 triangular form will distinguish it from its congeners. Found also at 

 Timor, 1S19" (Heward's "Biographical Sketch of A. Cunningham"), 



I cannot find JW remolum, Hew., anywhere else. N. remotum, 

 A.Br., in Synops. Filic, has evidently nothing to do with this 

 plant. If it is a good species the difficulty is under what genus to 

 place it. In Christ's sj^stera, as already stated, NeiyhrocHiun has 

 been eliminated. 



Christ separates JS^ephroIejns and Fhegopteris from Aspidhun, 

 as used by Bentham (B.FL), but writes Nephrodium and Aspidiu7n. 

 Perhaps Nephrodium remotiim, Hew., or Aspidium remottim, 

 according to the classification used, is synonymous with A. para- 

 siticum, Mett. 



39. Aspidium aristatum, Swartz, Endl., Prod. ISTorf. 23 {Poly- 

 stichum aristatum, Presl.). See A. decompositum, Spreng. 



40. Aspidium capense, Willd. {A. coriaceum, Swartz, End!., 

 Prod. Norf. 22 : JPolysiichum capense, Sm.). 



41. Aspidium decompositum, Spreng. (Nephrodiurn decomposi- 

 tum^ R.Br., and K. microsorum, Endl., Prod. Norf. 24, and N. 

 calanthum, Endl., Prod. Norf. 25 probably). 



A. Cunn. in Heward states : — 



^'Nephrodium microsorum, Endl., and X. calanthum, Endl., Prod. p. 9, I 

 have little hesitation in considering the same plant, the latter having its sori 

 somewhat more elaborate. At the same time, from comparison of specimens 

 in the Banksian herbarium, I have every reason to believe the two plants are 

 identical with Aspidium (Polystichum) aristatum, Sw." 



But Nephrodium microsorum, Endl., and N. calanthum, Endl., 

 seem to be both identical with Aspidium decompositum, Spreng., 

 {Nephrodium decompositum, R.Br.). Endlicher distinguishes 

 between the genera Aspidium and Nephrodium {Asjndium : 

 indusium orbicular, peltatel}'' attached. Nephrodium : indusium 

 reniform, attached in the sinus); and £i9, Nephrodium microsorum 

 and N. calanthum have both a reniform indusium, they cannot be 

 identical with Asjndium aristatum. 



Nephrodium microsorum and N. calanthum are only dis- 

 tinguished by the one being more membranous than the other; 



