1G4 



rOLYSTICTIUM AXGULARE. 



on tlic basal half of the pinnule, and at right angles to the 

 pinnule; in the upper half of the pinnae the pinnules much 

 broader, profoundly cut, but attached by a broad decurrent 

 base to the pinnule. The superior basal pinnule more acute 

 than the others, but not larger, whilst the inferior basal 

 pinnule is diminutive and not auricled. I am indebted to the 

 Kev. F. jMuIcs for fronds of this varietv. 



^> 





^si^mmmm 



rig. 142. 



DivERSUM, Wollaston. (Fig. 142.) — A slendcr-fronded form. 

 Length twenty to twenty-four inches; narrow. Pinnro distant 

 in loM'er half of frond. Basal pinn;r descending, the others 

 ascending or ilexuose. Pinnules stalked, very diverse. The 

 largest pinnules somewhat triangular, v»ith a bold, rounded, 

 auricled lobe, deeply cut, biserratc, soriferous only near the 

 apex of the pinnules. Sori diminutive, and but few on a 

 pinnule. Sometimes the larger pinnules interrupted by three 

 or four pairs of diminutive almost linear pinnules, or the apex 

 of the pinna) terminating in the^e diminutive pinnules; occa- 

 sionally the superior pinnules will be large, and the inferior 

 ones diminutive or even wanting. Slightly scaly. Colour i>ale 

 yellowish green. An interesting variety. ]My thanks are due 

 to Mr. G. B, AYollaston, of Chiselhurst, for fronds. 



