790 FERNS OF NORTH QUEEN SLAND, 



A. DiAPHANUM Bl.; A. affine Hook., Sp. Fil. ii., No. 65, non 

 Willd. 

 Cairns district; July- Aug., 1913. 



(?)Var. AFFINE A. van R. 

 Cairns district; July- Aug., 1913. 



Hooker, loc. cit., rightly called attention to the characteristic 

 black bristle-like hairs (12 or more) which are produced between 

 the veins on the upper surface, towards the lower margin and apex 

 of the pinnules, with a few on the underside. A. van Rosenburgh's 

 var. affine lacks these bristles, as does one frond among my North 

 Queensland specimens. 



A. HISPIDULUM Sw. 



Cairns district; July- Aug., 1913. 



Domin has dealt fully with the forms of this species, and has 

 set up a new species, A. tenue, allied to A. hispidulum, but lacking 

 the hairy surfaces. 



P T E R I s L. 

 Sub gen. Eupteris. 

 P. UMBROSA R.Br. 



Bank of creek by "Crossing," Malanda; Aug., 1913. 



A quite typical form, but the lower half of the pinnae almost, or 

 quite, entire; typically serrate at apex. 

 P. BiAURiTA L. var. quadriaurita Luerss. ; Pt. quadriaurita Retz. 



Near Josephine Creek, Bartle Frere; July, 1913. 



This fern and its allies have given considerable trouble to sys- 

 tematists. In H.B., Syn., Pt. hiaurita is placed in the section 

 Campteria, owing to the arched connecting veins at the bases of 

 the pinnules, while Pt. quadriaurita is assigned to Eupteris (veins 

 all free). The transitional forms, however, are so numerous as to 

 throw doubt upon the tenableness of the sectional divisions. I, 

 therefore, follow Luerssen and Domin in making the North 

 Queensland fern (veins always free) a variety of Pt. hiaurita. 

 Betehe, in Herbarium, Sydney, appears to have regarded the two 

 names as synonymous. 



