56 



W. W. WATTS. 



Cheilanthince. 



Sori occupying the upper ends of the nerves, sometimes 

 laterally confluent, sometimes extending backwards down 

 the upper branches of the nerves; the leaf-margins mostly 

 reflexed and often modified; stipes often black-polished. 



i. Leaves uniform. 



A. Nerve-ends scarcely thickened. 



Pellcea, Doryopteris, Notholwna, etc. 



B. Nerve-ends thickened. 



a. Sori on the nerve- ends. 



1. More or less laterally confluent: Cheilanthes 



2. Solitary at the base of a leaf-sinus: Hypolepis 



b. Sori occupying the whole of the upper 



nerve-branches : Neurosoria 



ii. Leaves, or segments of leaves dimorphous: Plagiogijria 



Summary of References. 

 Acrostichum pteroides R Br., Proclromus, p. 145 (1810); F. v. 

 Mueller, Fragmenta Phyt., v, p. 139 (1866), Second Census, p. 234 

 (1889); Bentham, Fl. Austr. vn, p. 780 (1878); Bailey, Fern 

 World of Australia, p. 74 (1881), Synops. Q. FL, p. 723 (1883), 

 Catal. Q. PL, p. 60 (1890), Lithograms Q. Ferns, t. 188 (1892), 

 Q. FL, p. 1994 (1902). 



Phorolobuspteroid.es Desvaux, Prodrome, p. 291 (1827). 



Neurosoria pteroides Mettenius — Kuhn, Bot. Zeit , xxvn, pp. 

 437 ff. (1869); Christensen, Index Fil. (1906); Domin, Pterido- 

 phyta, p. 147 (1913). 



Explanation of Plates. 

 Plate III. — Photographs by E. E. Pescott, f.l.s. 



a. Complete plant from Queensland Herbarium, natural size. 



b. Two fronds with parts of stipites, natural size. 



c. Rhizome with bases of stipites, natural size. 



Plate IV. — Microscopic drawings, a by Miss Phyllis Clarke; 

 b to d by C. C. Brittlebank. 



a. Section of pinnule (underside). 



b. End of a nerve, magnified cir. 100 times. 



