260 Transactions. — Botatiy. 



dite flowers in one locality, produce dioecious flowers in another part, where 

 the conditions are different. 



In the species under consideration the flowers are produced in great 

 conspicuous panicles, and are not only powerfully sweet-scented, but also 

 contain a quantity of honey. As in almost all such cases, the male flowers 

 are much larger and whiter than the female, which have a greenish hue, and 

 are more sparingly produced. They have also a much wider and flatter disc, 

 so that insects lighting on them turn round and round, smearmg the under 

 surfaces of their bodies with pollen. In hghtiug on the female flowers the 

 same process is repeated, the stigmas of the carpels being brushed over by 

 the under-surfaces of their bodies. The stamens expand from without 

 inwards, the outer anthers being often empty before the inner ones have 

 commenced to dehisce, so that the supply of pollen is kept up for some days. 

 These flowers seem to be chiefly visited by hairy Diptera of the size and 

 form of a common house-fly, but of which I do not know the species. 



Potentilla anserina has very conspicuous bright yellow flowers, which, 

 however, only expand fully in sunshine. Sir J. Lubbock states that the 

 species of this genus have the stigma arriving at matm-ity before the stamens, 

 so that cross-fertilization generally takes place. I have never been able to 

 detect any difference of such a nature. The honey, as he further states, is 

 secreted in a thin layer, not in drops. The flowers are faintly sweet- 

 scented. 



Geum urbanum is stated by Sir J. Lubbock to be melliferous. I have not 

 examined it. 



Accsna sanguisorbcB has its flowers clustered into small heads. They are 

 distinctly protorogynous, and, when the stamens expand, they do so one 

 after another. From their inconspicuousness, want of scent, and large 

 papillose stigmas, I am inclined to think that they are wind-fertilized. 

 Nat. Ord. Saxifrages. 

 CarpodetKs sermtus, belonging to the tribe Escallonieas, is apparently 

 dependent altogether on insects. The flowers are conspicuous and very 

 fragrant ; they produce a large amount of honey, and are distinctly pro- 

 terandrous . 



Weinmannia racemosa, belonging to the tribe Cunoniese, has also very 

 conspicuous sweet-scented and melliferous flowers. I have not noticed 

 whether they are also proterandrous. 

 Both these species are hermaphrodite. 



Nat. Ord. Ceassulaces. 

 This order is only represented in New Zealand by five species of TillcBa, 

 three of which occur in this neighbourhood. Of these T. sindairii and 

 T, verticillaris have extremely minute flowers. T. viosQhata has also very 



