Conclusion.

To summarise, all forms of C. Sinclairii are glabrous on both leaf-surfaces; all forms of C. incana and of C. Allanii are tomentose on both surfaces; C. Du Rietzii has leaves glabrous or glabrate above and tomentose below; C. Cockayniana differs from C. Du Rietzii in being entirely rupestral and in the possession of foliaceous bracts; while C. discolor differs from each of the above in the possession of small leaves not normally tufted at the ends of the stems.

The writer desires in conclusion to acknowledge the assistance he has received in this research from the curators of the museums at Auckland, Wellington, Christchurch, and Dunedin, who readily granted permission to study the herbarium material housed in these institutions, and from Miss L. Cranwell, M.A., Miss M. Sutherland, B.Sc. (For.), and Rev. Dr. J. E. Holloway, who facilitated that study. The late Dr. L. Cockayne was particularly interested in this investigation and greatly encouraged us in our work by ready assistance and helpful advice. Most of all, however, my thanks are due to Dr. H. H. Allan, without whose collaboration this paper would have been impossible in its present form. He willingly placed at my disposal all the information he had gleaned from a careful study