Nat. Ord. Plantagineæ. Plantago raoulii is the only common plant of this order. Though its flowers are hermaphrodite, they seem to be exclusively cross-fertilized, and to depend on the wind for the performance of this necessary occurrence. They are very inconspicuous, scentless and destitute of honey. As soon as the flowers open, the long papillose stigmas protrude, while the stamens remain undeveloped. The flowers lowest down the spike open first and those at the top last, and the withering of the stigmas takes place in the same order. As the stigmas wither, the filaments commence to lengthen, bearing at their extremity the versatile anthers full of light friable pollen. Even then of course some of the upper flowers are only in the pistillate stage, and may get pollen from flowers lower down the same spike, but in most cases it must be blown from flowers either on different plants or different spikes. Nat. Ord. Chenopodiaceæ. The plants of this order bear very inconspicuous flowers, which are sometimes hermaphrodite, but more commonly polygamous. Chenopodium triandrum is the only one I have examined with care. When hermaphrodite, its flowers are very distinctly proterogynous, the stigmas withering completely before the anthers dehisce, so that in this, as in diœcious forms, self-fertilization is impossible. It is an anemophilous plant, and this will probably be found to be a character of all the New Zealand species of the order. Nat. Ord. Polygoneæ. Polygonum aviculare is apparently self-fertilized, the flowers being small and destitute of honey or scent. The species of the genus Muhlenbeckia are anemophilous. They are almost always diœcious, though sometimes imperfectly hermaphrodite. They are very inconspicuous in colour, destitute of scent and honey, and furnished with large plumose or papillose stigmas. I have not noticed any insects visiting them. Rumex flexuosus and R. neglectus are hermaphrodite. The flowers are distinctly proterandrous however, and dependent for fertilization on the wind. Nat. Ord. Thymeleæ. The only plant of the genus Pimelea which I have looked into is the common but very variable P. prostrata. Though hermaphrodite in structure, this species is diœcious in function, and will probably tend rapidly to become so in structure as well. In those forms of it which are truly hermaphrodite there is a simple contrivance to prevent self-fertilization. Just before the flowers expand, the style (which is placed to one side of the