180 NATURE STUDY AND AGRICULTURE 



growth. Do all the seeds germinate at the same time? 

 After two or three weeks, pull up some of the weeds, such 

 as pigweeds and purslane. Do others now germinate and 

 grow ? Plant some cocklebur seeds that have been kept 

 in the house all winter and some that have been left out 

 of doors. Note results. 



List of Some Common Weeds 



Garden: Pigweed, amaranth, or careless weed *; purslane *; 

 foxtail grass x ; crab grass l ; smart weed *; horse weed or colt's 

 tail *; lamb's quarter *; spotted spurge. 1 



Field: Mustard *; cocklebur *; Russian thistle *; tumble 

 weed x ; butter print or velvet leaf *; shepherd's purse; milk- 

 weed 3 ; wild morning-glory 3 ; bindweed or wild buckwheat 1 ; 

 Canada thistle 3 ; corn cockle 2 ; ragweed 1 ; wild lettuce or 

 prickly lettuce *; wild oats x ; pigeon weed or corn gromwell x ; 

 sorrel or sour weed 3 ; fleabane 3 ; quack grass. 3 



Meadow: Pasture and lawns; wild carrot 2 ; wild parsnip 2 ; 

 sow-thistle 2 ; foxeye daisy; yellow or bitter dock 3 ; iron weed 3 ; 

 plantain 3 ; dandelion 3 ; mullein. 2 



Waste lands and roadsides: Burdock 2 ; dog fennel *; Spanish 

 needles *; giant ragweed 1 ; jimson weed *; button weed. 2 



Farmers' Bulletins: Weeds and How to Kill Them, 

 No. 28; Weeds Used in Medicine, No. 188. 



1 Annuals. ' Biennials. 3 Perennials. 



