SEED TRAMPS 155 



seen all summer, tapered off at the summit with their 

 bright golden blossoms. 



We all know the tenacious burdock and the cockles 

 and clot-burrs, the most formidable of their kind among 

 our native burrs ; and he who has come into contact 

 with the enterprising barbed spines of the sly " hedge- 

 hog" caltrop as he reclined for comfort on the sand 

 of the sea-shore, has probably speedily arisen to express 

 his full recognition of their prior right to the premises. 

 One of these vile burrs is shown on page 274, the sin- 

 gular fruit of the Cenchrus, an anomaly among the tribe 

 of grasses. 



