io6 ALIEN FLORA OF BRITAIN 



species came up, and its seed was afterwards recognised 

 in other samples. This is, therefore, probably one of the 

 casuals introduced with foreign bird seed. 



Calendula arvensis, L. A native of dry sandy hills in 

 South-East Europe and Western Asia. Its range as a 

 weed of cultivation extends from there through the 

 Mediterranean area into Central Europe. Several times 

 recorded from waste ground in England and Scotland, 

 evidently introduced with grain. 



Oalendula officinalis, L. The common garden Mari- 

 gold. A native of calcareous rocks in the Mediterranean 

 region. It is a frequent straggler from cultivation ; in 

 fact, it is one of the most consistent and conspicuous 

 indications of colonies of aliens resulting from the 

 throwing out of garden rubbish. 



€alotis cuneifolia, R. Br. A native of arid sandy 

 ground in Australia. It infests sheep pastures in many 

 parts of that Continent and New Zealand. Its seeds 

 cling, by means of their barbed bristles, to the sheep's 

 wool, and, becoming inextricably entangled, are imported 

 with the wool to this and other countries. The pest is 

 known as the Burr to sheep-farmers, and as Carrot Seeds 

 to wool-dealers (in consequence of their conical shape). 

 It has been recorded in England in connection with 

 wool refuse. 



Clalotis hispidula, F. v. M. A native of the Western 

 Plain of New South Wales, having the same character 

 and being recorded in the same conditions as the 

 last. 



