286 FERNS : BRITISH AND FOREIGN. 



Colysis Spectrum, also the beautiful Cibotium Menziesii, were 

 sent to the "Royal Gardens, Kew, from the Sandwich Islands by 

 Dr. Hillebrand, in 1863. 



68. CYSTOMIUM. 



1*. C. Fortune!, J. 8m. Fronds 1-1^ foot long, pinnate ; 

 pinnae lanceolate, falcate, acuminate, 2-3 inches long, 

 1 inch wide, entire, the base oblique, the inferior 

 rounded, the superior truncate and subauriculate. 

 Costa ebenous, upper surface dull, unreflecting. Sori 

 numerous. Japan. 



OBS. In Herbaria, specimens of this cannot readily be dis- 

 tinguished from C. falcatum ; but on seeing living plants stand- 

 ing side by side, the difference is evident ; C. Fortunei being a 

 smaller-growing plant, thinner in texture, and not lucid and 

 reflecting light, as C. falcatum. 



70. ASPIDITJM. 



3*. A. polymorphum, Wall. ; Hook. Sp. Fil. 4, p. 54 (exclud. 

 syn.). India, Ceylon. 



3**. A. Barter!, J. Sm. Vernation erect. Fronds pinnate, 

 1-2 feet high ; pinnae linear-lanceolate, 6-7 inches 

 long, 1 1 3- broad ; the lower pair sometimes binate, 

 or auriculated on the lower margin. Sori regularly 

 biserial between the primary veins. Indusium small, 

 fugaceous. Aspidium polymorphum, Wall, ac- 

 cording to Hook. 8p. Fil. 4, p. 54. West Africa, 

 Fernando Po. 



OBS. This is quite distinct from the preceding species. 

 In A. Sarteri the sori are perfectly serial, whereas in A. poly- 

 morplmm the sori are scattered. 



74. POLYSTICHUM. 



6*. P. lepidocaulon, J. Sm. Aspidium lepidocaulon, Hook. 

 Sp. Fil. 4, t. 217. Japan. 



