64 T ran mcliom. 



Art. IV. — A New Species of Hypolepis. 

 By H. Carse. 



[Head befort tin Auckland Institute, 11th December, 1917; received by Editors, 24th 

 December, 1017 ; issued separately, 24th May, 1918.] 



Hypolepsis Petrieana sp. nov. ('arse. 



Hypolepis bipinnata, H. millefolio Hook, affinis : differt stipite glabro + 

 tuberculato ; ramis primariis numerosis parum distantibus. Superioribus 

 a rhachi angulis valde obtusis provenientibus ; pinnis secundariis in lobos 

 breves late obcuneatos, acutos, subacutos, v. fere obtusos, integros v. + alte 

 (plerumque a margine superiore) incisos, pro parte maxima alternos, sectis. 



Sori parvi rotundati pauci, in lobis singulis, 1, rarius 2. 



Khizoma tenue, repens, squamis linearibus ferrugineis dense vestitum. 



This undoubtedly new species of Hypolepis was discovered in December, 

 1907, by Mr. D. Petrie, M.A., Ph.D., with whose name I have pleasure 

 in associating it. 



Rhizome slender, creeping, thickly covered with linear rusty scales. 



Stipes 4-6 in. long, rigid, moderately stout, erect, yellow (as are the 

 rhachis and primary costae) or the lower part brownish, glabrous, somewhat 

 rough with scattered depressed tubercles. 



Fronds 12-14 in. long, 8-10 in. broad, broadly obcuneate-ovate, subrigid, 

 bipinnate, secondary pinnae pinnatifid or their lower part pinnatisect ; 

 primary branches numerous, rather closely placed, the upper diverging 

 almost at right angles. 



Rhachis and primary costae sparingly or somewhat closely clothed with 

 delicate crisped hairs ; lower primary pinnae narrow ovate - lanceolate, 

 6-8 in. long, suberect or ascending, shortly stipitate, the upper gradually 

 shorter, narrower, and more strongly diverging ; secondary pinnae very 

 shortly stipitate, broadly linear, 2j in. long or less, cut half-way down, or 

 almost to the costa, into short entire or + deeply cut (mostly at the upper 

 edge) broadly obcuneate, acute, subacute, or almost obtuse, usually alternate, 

 lobes, that are glabrous above and nearly so below ; midrib with a few 

 short hairs, chiefly on the under-surface. 



Sori 1, or rarely 2, on each ultimate lobe, small, rounded, the common 

 one partially covered by a very short reflexed lobule projecting from the 

 upper basal border of the lobe, the second (when present) placed about half- 

 way up the lower side of the lobe and more or less covered by its slightly 

 expanded and recurved margin. 



Indusium composed of the almost unaltered reflexed portions of the lobes 

 described above. 



Hab. — Vicinity of Otorohanga, Waipa County, and Port Charles, Coro- 

 mandel County. D. Petrie ! 



