Laing. — Revised List of the Norfolk Island Flora. 13 



upon is that all these forms are found on one rootstock, and even sometimes 

 on one frond. All forms are fertile, but sori are more general on the deeply 

 incised forms. 



17. Asplenium dimorphum Kze. (= A. diversifoliu m A. Cunn., E. 29, 



M. 33.) 

 Abundant in the bush. Commonly called on the island " the two-frond 

 fern." 



Apparently confined to Norfolk Island. 



18. Asplenium adiantioides (L.) C. Chr. (= A. falcatum Lam., E. 27, 



M. 34.) 



Common, chiefly on tree-trunks. 



Lord Howe, New Caledonia, Australia, New Zealand, and widely through- 

 out the warm regions of the Old World. 



19. Blechnum lanceolatum (R. Br.) Sturm, var norfolkianum Hew., 



M. 25. (= Stegania lanceolata, E. 34.) 



Common. 



Kermadecs, New Zealand, Australia, Polynesia. 



Blechnum discolor (Forst.) Keys., M. 24, is recorded by Maiden, but, 

 as he now thinks, erroneously. I did not see it. 



Blechnum acuminatum Baker, M. 26. This is probably identical with 

 or only a variety of B. lanceolatum. B. acuminatum Baker is, according to 

 Christiansen, a synonym for B. acrodontum (Fee) C. Chr., a Mexican plant, 

 but Cheesemanf regards (and no doubt correctly) Lomaria acuminata Baker 

 (= B. acuminata Baker) as a synonym of L. norfolkiana Hew., which in turn 

 is a synonvm of No. 18 above. Maiden considers B. acuminatum as inter- 

 mediate between B. attenuata and B. lanceolata. 



20. Doodia caudata R. Br., E. 32, M. 29. 



Abundantly by sides of creeks, in the bush. 

 Australia, New Zealand, New Caledonia. 



21. Doodia media R. Br. var. Kunthiana Sand., E. 33, M. 28. 

 Australia, New Zealand, Polynesia. 



22. Doodia aspera R. Br., M. 28. 



Perhaps only a variety of the above. 



Lord Howe, Australia. 



Pellaea rotundifolia Hook., M. 17, is recorded in Benth. from Norfolk 

 Island, under the genus Pteris, but almost certainly in error. I did not 

 see it. 



23. Notholaena distans R. Br. (= Nothoclaena distans R. Br., M. 16.) 

 Near " the English Oak," hillsides near the Cascades, and other dry 



places. 



Lord Howe, Australia, New Zealand, ISIew Caledonia, Polynesia. 



24. * Cheilanthes tenuifolia (Foist.) Swartz var. Sieberi, M. 15, E. 45 and 46. 

 This has also been recorded from Norfolk Island, but after search 1 



was unable to find it. I think most probably Notholaena distans has been 



Manual of N.Z. Flo: a. p. 978. 



