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OF THE ' CHALLENGES ' EXPEDITION. 109 



pressed, lanceolate, black scales with a brown border. Phyllopode 

 very short. Stipes naked, ^-1 inch. Fronds dimorphic : the barren 

 ones oblanceolate-oblong, obtuse, 1-2 inches long, cuneate at the base, 



2 



f inch broad ; the fertile ones ligulate, 3-4 inches long. Veins quite 

 immersed. Texture very thick and rigid, the upper surface naked ; 

 the lower with only a coating of minute stellate scales, visible under 

 a lens, with a distinct bare space round each. Sori occupying the 

 upper half or two thirds of the fertile fronds, superficial, \ line 

 broad, 6-8 in an erecto-patent row between midrib and edge. 

 Little Kei Island. 



Nearest typical N. adnascens, but much thicker and more rigid 

 in texture, with superficial sori as large as in Lingua, and only 



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spaced lepidote scales. 

 Polypodium (Phymatodes) irioides, Lam. 



Admiralty Islands. 



341*. P. (Phymatodes) millisorum, Baker, n. sp. Rhizome not 

 seen. Stipe stout, with a narrow wing extending nearly to the base. 

 Lamina linear-ligulate, 2-2 J feet long, 2-2 £ inches broad at the 

 middle, narrowed very gradually to both ends, rigidly coriaceous, 

 quite free from hairs or scales on both surfaces. Veins fine, immersed, 

 the main ones zigzag, g-j inch apart in the centre of the frond, di- 

 stinct three quarters of the way to the edge ; areolae copious, 

 minute, with abundant free included veinlets. Sori \ line broad, 

 round, superficial, crowded, filling up the whole of the upper half 

 or two thirds of the frond, distinctly visible on the upper side. 



Little Kei Island. 



Differs from P. irioides by its rigidly coriaceous texture, larger 

 sori, and less distinct veins. 



P. (Phymatodes) lingu^eforme, Mett. 

 Admiralty Islands. 



* 



Very fine specimens of this rare and little-known species. 



322*. P. (Phymatodes) rampans, Baker, n. sp. Rhizome very wide- 

 creeping, £ line thick, clothed only with a few minute, adpressed, 

 linear, dark-brown scales. Stipes naked, very short. Lamina simple, 

 lanceolate-ligulate, 4-6 inches long, f-lj inch broad at the middle, 

 acute, narrowed gradually to the ends, membranous, both surfaces 

 quite naked. Main veins erecto-patent two thirds of the way to 

 the edge, then uniting in an arch ; areolae rather large, very di- 

 stinct, each with an included knobbed free veinlet. Sori not present. 



Admiralty Islands. 



A next neighbour to P. lycopodioidcs* 



