Art. XXI.—Contributions to a Fuller Knowledge of the Flora of New Zealand: No. 3. By T. F. Cheeseman, F.L.S., F.Z.S., Curator of the Auckland Museum. [Read before the Auckland Institute, 22nd November, 1909.] As in the two previous instalments of notes bearing this title (see Trans. N.Z. Inst., vol. xxxix, p. 439; vol. xl, p. 271), I have to acknowledge my indebtedness to many friends and correspondents in various parts of the Dominion for much of the matter now placed on record. I particularly desire to mention my obligations to the late Mr. H. J. Matthews, whose position as head of the Forestry Department gave him many opportunities of obtaining information respecting the New Zealand flora, and who for years past has liberally supplied me with specimens, notes, and photographs. His decease will be greatly regretted by New Zealand botanists, by whom he was held in high esteem, not only for his many services to botanical science, but also for his amiable and genial disposition, the simplicity of his manners, and his truly lovable character. I have also to express my thanks to the following gentlemen: to Mr. F. G. Gibbs, of Nelson, who has forwarded many interesting notes and specimens, mostly dealing with the botany of the north-western portion of the Nelson District; to Mr. B. C. Aston, of Wellington, for many specimens collected through almost the whole length of the Dominion; to Mr. R. H. Matthews, of Kaitaia; to Messrs. H. Carse, P. H. Allen, A. Allison, Rev. F. R. Spencer, F. N. R. Downard, J. H. Harvey, G. Williams, W. Townson, R. Mair, E. Linton, E. Clarke, C. Dawes, and others. I. Ranunculaceæ. Ranunculus Buchanani, Hook. f. Abundant on the slopes of Mount Balloon, McKinnon's Pass, southwest Otago; altitude, 4,000 ft.; H. J. Matthews! F. G. Gibbs! Ranunculus Matthewsii, Cheesem. Southern slopes of Mount Balloon, a few hundred feet above the track over McKinnon's Pass; H. J. Matthews! Ranunculus sericophyllus, Hook. f. McKinnon's Pass, south-west Otago; 4,000-5,000 ft.; H. J. Matthews! F. G. Gibbs! IV. Violaceæ. Hymenanthera novæ-zealandiæ, Hemsl. Mr. W. B. Hemsley (“Kew Bulletin,” 1908, p. 95) has pointed out that the New Zealand plant referred by Kirk and myself to the Norfolk Island H. latifolia is in reality distinct from that species. He states that the Norfolk Island plant has relatively more slender branches, thin entire leaves, smaller flowers, and the staminal appendages are only fringed at the tips instead of being minutely toothed all round the margin. Mr. Hemsley has also satisfied himself that Cunningham's Scœvola novœ-zealandiœ, collected at Matauri Bay, opposite the Cavallos Islands, and which Hooker referred