152 A CONTBIBUTION TO, ETC. 



widely. The prairie grass affords excellent pasture for the winter, 

 and the buffalo grass is very useful for binding the soil together 

 in sandy places. 1 have seen specimens of Lappago racemosa from 

 remote parts of the colony, and I believe that it is now considered 

 indigenous. 



In closing my present paper, I feel some pleasure in having 

 opened up a subject which affords a very wide field for investiga- 

 tion. For some years past, I have paid attention to introduced 

 plants, but as my observations have been confined to Eastern 

 Australia, they are necessarily imperfect. It would be well if 

 observers in Western and Southern Australia would communicate 

 to the public the result of their inquiries, for probably many 

 plants, which have not appeared amongst us, have found their 

 way accidentally into the other Australian colonies. 



NOTE. I have noticed Argemone Mexicana of the Poppy Family growing 

 wild on the banks of the Hunter, and also Linaria spuria in a field near 

 Parramatta. Gymnosperma glutinosum sprang up in the same neighbourhood, 

 but it does seem likely to spread. Verbascnm in two varieties comes up 

 occasionally in cultivated ground, and Senecio scandens, Passiflora ccerulea, 

 Alaternus, and Pelargorium graveolem frequently escape from gardens and 

 appear in waste places. 



ALGJ1 OR SEA-WEEDS. 



HEN strolling along the shore at Manly Beach some little 

 time since, I met with a lady in the midst of a mass of brown 

 sea-weeds, earnestly engaged in seeking for the beautiful marine 

 plants which are so frequently found about their roots. Per- 

 ceiving that she was occupied in the same pursuit as myself, I 

 took the liberty of addressing her, with a view of ascertaining 

 whether she could assist me in determining some of the difficult 

 species. I found, however, that my fair fellow-labourer was 

 simply searching for red sea-weeds, without any reference to 

 genera or species, probably intending them for some ornamental 

 work. It struck me at the time, and it has often occurred to me 



