BY J. H. MAIDEN. 1 49 



I think the following plants in Hemsley's list were probably 

 introduced by the hand of man during the present century : — 

 Oxalis Gorniculata, Linn., Bidens pilosa, Linn., Panicum sangid- 

 7iale, Linn. To these I might perhaps add Solanum nigrum. 



I now propose to add notes on some weeds collected by me, 

 indicating whether they have been previously recorded or not, and 

 giving some notes of more or less interest in regard to them, just 

 as I have done in the case of introduced plants. 



CEUCIFER.a:. 



Senebiera didyma, Pers. — Abundant. Recorded originally 

 by Moore, 



caryophyllej:. 



Cerastium vulgatum, Linn. — A Chickweed (Mouse-ear) not 

 recorded. 



PoLYCARPON TETRAPHYLLUM, Zo«/?. — Abundant. Not recorded. 



PoRTULACA OLERACBA, TAun. — ^" Pig-weed " or " Purslane." 

 Not recorded. So abundant in some places as to be used with 

 sweet potato vines for pig-feed. 



LEGUMINOS.a:. 



Medicago denticulata, Willd. — Not recorded. Plentiful. 

 Not a noxious weed, as there are no sheep on the island ; at 

 certain seasons it is a useful fodder plant. At the same time it 

 is often a nuisance in gardens and other cultivation patches. 



ViciA sativa, Jjinn. — " Vetch." Not recorded. Several 

 patches in the long grass close to the beach near Thompson's 

 landing-place. 



Cassia l^vigata, Willd. — Not recorded. I observed a thicket 

 of this at the back of Mrs. T. Nicholls' ground. It goes by the 

 ridiculous name of "Myrtle" on Norfolk Island, where it became 

 such a pest that a regulation was adopted under which it was 

 exterminated. I strongly urged its eradication in Lord Howe 

 Island. 



