1980 CLVI. FILICE8. [Polypodium^ 



Fronds 3 to 12in. long. Sori large, oval, in a single row on each side 



of the midrib. Scales small 15. P. confluent. 



Fronds 6in. to 2ft. long. Sori small, very numerous, and densely 



crowded in many rows. Scales minute .... 16. P. acrostichoidet. 



Sub-genera Gonioplllebiuin and Phymatodes. Fronds 

 without stellate scales. Sori large and distant in a single row 

 (or 2 in P. phymatodes) on each side of the midrib, each sorus in a 

 oavity forming a pustule on the upper surface (except P- simpli- 

 cissimum.) 



Fronds long and narrow, entire or orenate. 

 Fronds coriaceous smooth and shining, the venation concealed in 



the texture 17. P. attenuatum. 



Epiphjte. Fronds linear-lanceolate, 12 to 13in. long, about lin. 



broad, decurrent to a very short stipes 18. P. superdciale, 



vsr. auitraliente. 

 Fronds rigidly membranous, the larger veins conspicuous . . . . 19. P. simplicUiimum^ 

 Fronds deeply pinnatifid with long segments confluent in a broad 

 wing to the rhachis. 

 Fronds usually above IJft. high. 



Segments membranous, showing the veins 6in. to 1ft. long, 1 to 



IJin. broad, with narrow points . . 20. P. nigre$cens. 



Segments smooth, the veins inconspicuous, 4 to Sin. long, J to 



IJin. broad 21. P. phymatodes. 



Fronds usually under ipt. high. 

 Segments rather firm, showing the primary veins, 3 to Bin. long, 4 



to 8 lines broad 22. P. pustulatum. 



Segments membranous, smooth, the veins scarcely conspicuous, 



rarely above 3in. long 23. P. scandens. 



Fronds pinnate, the pinnae articulate on the rhachis at least when 

 fertile. 

 Pinnae membranous, 6 to Sin. long, ^ to lia. broad, cuneate at the 



base 24. P. verrucosum. 



Pinnae 3 to Bin. long, 3 to 5 lines broad, serrate, truncate or 



auriculate on the base , 25. P. subauriculatum^ 



Pinnae rigid, 3 to 9in. long, 3 to 9 lines broad, cuneate at the 

 base. Barren fronds sessile, short and broad 26. P. rigidulum. 



Fronds without stellate scales. Sori irregularly scattered or in several 

 rows, with a very slight or no corresponding prominence on the 

 upper surface. 

 Fronds entire, long and broad. Sori numerous and small . . . . 27. P. irioides. 

 Fronds deeply pinnatifid with long segments confluent in a broad 

 wing to the rhachis. Sori large, in about 2 rows. 

 Venation inconspicuous. Single free veinlets in several areolae. 



• Receptacle prominent on the upper surface 21. P. phymatodes. 



Fronds deeply pinnatifid. Sori numerous and small. Barren fronds 

 sessile, short and broad 28. P. quereifolixtm. 



(See also sect. Sagenia in Aspidium.) 



1. P. australe (southern), Metten.; Hook. Spec. Filic. iv. 167, Syn. Filia.. 

 322; Benth. Fl. Austr. vii. 762. Fronds entire, coriaceous, glabrous, linear or 

 oblanceolate, usually 3 or 4in. long but sometimes reduced to about ^in., 

 or when very luxuriant above 6in., obtuse, contracted into a short stipes. Veins, 

 diverging from the midrib, once or tvyice forked, free, but concealed in the thick 

 substance of the frond. Sori oblong or linear almost as in Grammatis, rather 

 large, oblique and parallel in a single row on each side of the midrib, and when 

 old often confluent, covering nearly the whole surface. — F. v. M. Fragm. v. 127 ; 

 Bail. Litho. Ferns Ql. 140, northern and southern forms ; Grammitis australis, R. 

 Br. Piod. IIG; Hook. f. Fl. Tasm. ii. 151; Sieb. Fl. Mixt. n. 235; (?. 

 Biliardieri, Willd. Spec. v. 139 ; Pohjpodium aiminutum, Bak. Syn. Fil. 507. 



Hab.: Northern and southern ranges. 



Also in New Zealand and the extreme south of America. 



