Laing. — The Norfolk Island Species of Pteris. 237 



Conclusion. 



The results of this paper .may thus be summed up in a list showing the 

 chief forms of Pteris on the island : — 



(1.) Pteridium esculentum (Forst. f.) Cockayne = Pteris esculenta Forst. f. 



(2.) Pteris tremula E. Br. = P. Baueriana Dies. 



(3.) Pteris Kingiana Endl. (vide fig. 1). 



(4.) Pteris biaurita L. var. quadriaurita Eetz. = ? P. Tratlinickimm Endl. 



{vide fig. 2). 

 (5.) Pteris comans Forst. f. = ? P. Zahlbruckneriana Endl. {vide fig. 3), 

 (6.) Pteris Brunoniana Endl. {vide fig. 4). 

 (7.) Histiopteris {Pteris) incisa (Thbg.) J. Sm. {vide fig. 5). 



Art. XXVII. — Some Further Additions to the Flora of the Mongonui County* 



By H. Carse. 

 Communicated by T. F. Cheeseman, F.L.S., F.Z.S. 

 [Bead before the Auckland Institute, 8th December, 1915.] 



1. Hypericum gramineum Forst. 



On rather bare slope of moorland between Kaitaia and Awanui. Rare 

 in the north. 



2. Melicytus micranthus Hook. f. 



Both var. longiusculus Cheesem. and var. microphyllus Cheesem. occur 

 freely. 



3. Geranium pilosum Forst. 



Plentiful throughout the district. 



4. Leptospermum scoparium Forst. (two forms, as under). 



A very curious " sport " of this plant occurs in a maritime morass near 

 Ahipara. It is a low, densely branched shrub under 1 ft. in height. The 

 branches are little more than 1 mm. in diameter; many less than that. 

 The leaves are 2-4 mm. in length. I have not seen flowers or fruit. 



A form of Leptospermum scoparium is not uncommon in w^hich, in place 

 of 5 petals and a 5-valved capsule, as is usual, many of the flowers have 

 6-10 petals and the same number of valves. I have not, however, seen any 

 with more than 5 sepals. 



5. Crantzia lineata Nutt. 



A form of this plant with unusually large leaves occurs in fresh water 

 in several places in the North Cape Peninsula. Leaves 20-35 cm. long, 

 5 mm. wide. Usually this plant occurs in damp sand. The present form 

 is found in fairly deep running water. 



6. Coprosma spathulata A. Cunn. (form with red drupes). 



In the " Manual of the New Zealand Flora " the drupe of this species is 

 described as " black, very rarely red." In woods in this district, where the 



*This is a continuation of my former papers: see Trans. N.Z. Inst., vol. 47 (1915), 

 pp. 76-93; vol. 45 (1913), pp. 276-77; and vol. 43 (1911), pp. 194-224. 



