792 FERNS OF NORTH QUEENSLAND^ 



physes that are often found in the sorus. In A. reticidatum and 

 A. callifolium^]., the end cells of the paraphyses are linear, while 

 in A. semicostatum Bl., they, are club-shaped. The separation of 

 the two former species from one another is, failing* access to well- 

 authenticated specimens, not quite clear to me. Domin holds that 

 the net-like sori of A. reticidatum are decisive; but mj^ specimens 

 vary considerably in that respect. I have no specimen that I can 

 unhesitatingly refer to A. callifoliuyn, which Domin succeeded in 

 finding. Most of my specimens possess a distinct, central midril), 

 sometimes extending nearly half-way up the leaf, which attains as 

 much as 19 inches in length. In the case of two or three plants, 

 which grew on the face of a large boulder in the bed of French- 

 man's Creek, the fronds had divided apices. Ferguson, in his 

 "Ceylon Ferns" (p. 52), states that nearly all his specimens of Ji. 

 reticulatum had costae distinct for 4-5" up, and also that some- 

 times the, fronds were "bifurcated." The Frenchman's Creek 

 fronds, referred to above, were more than bifurcated. For con- 

 venient reference, I record these specimens as forma ajncilohatum. 

 (Plate Ixxxviii., fig. 10). 



POLYPODIKJ'.. 



Hymenolepis Kaulf. 



H. spicata(L.) Presl. 



Babinda, Frenchman's Creek, Kuranda, etc.; July- August, 1913. 



P L Y p o D I u M L. 



S ubgen . Eupolypodium. 



P. GoRDONi, sp.nov. (Plate Ixxxix., fig. 12a-c). 



Ejnphyticum in arboribus et rupibus; rhizoma breve, paleis 



pallido-brunneis, dense confertis, breviter lanceolatis, plerumque 



obtusis, levibus praeditum. Stipites conferti, brevissimi fere nulli, 



ad basin alati, nudi velpubescentes. Frons erecta vel suberecta, 



3-12cm. vel ultra longa, 1-2 cm. lata, simpliciter pinnata, medio 



plus minusve oblonga, ad basin longiore, ad apicem breviore 



angustans, recta vel subfalcata; pinnis usque ad 20 vel ultra, 



maxime l-l"5cm. longis, 0'3-0*5cm. latis, alternantibus, a basi 



lato confluente vel subconfluente oblongo-lanceolatis, obtusis, plus 



minusv^e recurvatis, inferioribus gradatira brevioribus, infimis in 



