6 CONTENTS. 
‘IJ. DESCRIPTIONS OF THE SEEDS OF THE COMMERCIAL BLUEGRASSES AND THEIR 
Impvuritres—Continued. 
Weed seeds commonly found with commercial bluegrass seeds 
Bursa bursa-pastoris (L.) Britton, shepherd’s-purse --........--- 
Lepidium virginicum L., peppergrass ..-----.-------- < 
Cerastium vulgatum L., mouse-ear chickweed 
Alsine media L., common chickweed 
Alsine’ graminea: (ie) “Britton soe ee ee ee 
Carduus arvensis (is) Robs-. Canada thistle 9a—  e 
Taraxacum taraxacum (L.) Karst., dandelion 
Matricaria inodora L., scentless camomile 
Hieraciwim sp;, hawk weeds = 2 oes ne ee eee 
Anthems cotula ts., dog fennel, may weed = 22 a ee 
Chenopodium album L., lamb’s-quarters, pigweed_..-..--.------- 
Plantago lanceolata L., rib-grass, buckhorn, English plantain... 
‘Rumez crispus a. curled:dockoo-= 2 Soe ee 
Rumex acetosella L., sheep’s sorrel, sorrel 
Veronica arvensis L., corn speedwell 
Juncustenuis Willd slender rush®. 33-2 e ee eee 
Juncoides campestre (L.) Kuntze, field rush 
SUNGCOLAES CLOTAGE DCS SWOOG TUS Ie Ba ee 
Carex cephalophora Muhl., oval-headed sedge. .---..------------ 
Ergot occasionally found in commercial bluegrass seed 
Claviceps purpurea (Fr.) Tul., ergot 
