PHENOLOGY OF WEEDS 

 BLOOMING PERIOD OF COMMON WEEDS 



787 



Stellaria media A. Chickweed , 



Capsella /bursorpastoris A. Shepherd's purse 



MeAioago lupuUna A. Yellow trefoil 



Oxalts comiculata A. & P. Lady's sorrel 



Taraxacum officinale P. Dandelion 



Nepeta Jiederacea P. Ground ivy , 



Barbarea vulgaris B. Yellow rocket , 



Cynoglossum boreate B. Hound's tongue , 



Flantago lanceolata P. Buckhorn , 



Banunculus abortivus B. Small-flowered buttercup 



Ranunculus septentrionalis P. Buttercup , 



Bumew altiss,imu^ P. Smooth dock , 



Taraxacum erythrospermum P. Small-flowered dan- 

 delion 



AMwm aanadense A. & P. Wild garlic 



Asolepias spedosa P. Showy milkweed 



Brassica arvensis A. Wild mustard 



Bromus tectorum A. Downy hrome grass 



Garum carvi B. Caraway 



Cerastium visicosum A. & P. Mouse-ear chickweed. 

 Convolvulus arvensis P. European morning-glory. . 



Convolvulus sepium P. Wild morning-glory 



Batura tatula A. Purple thorn-apple 



Euphorbia marginata A. Snow-on-the-mountain 



Euphorbia preslii A. Spurge 



Glycyrrhiza lepidota P. Wild liquorice 



Hierochloe odorata P. Vanilla grass 



Hordeum pusillum A. Small squirrel-tail grass. . . . 



Lepidium apetalum A. Apetalous peppergrass 



LeipicKum virgimiioum A. Wild peppergrass 



Lithospernnum a/rvense A. Corn gromwell 



Lolium italicum B. or P. Italian rye-grass 



Malva rotundifoUa P. Common mallow 



Oxybaphus nyotagineus P. Wild fonr-o'clook 



Flantago major P. Door-yard plantain 



Flantago purshii A. Pursh's plantain 



Fotentilla anserina P. Silverweed 



Radicula palustris A. or B. Marsh cress 



Rhus toxicodendron P. Poison ivy 



Rudbeckia hirta B. Black-eyed Susan 



Rumex acetosella P. Sheep sorrel. 



Sisymbrium officinale A. Hedge mustard 



Bolamum cm-olinense P. Horse nettle 



Bolanum rostratum A. BuffaJo-bur 



Bonchus oleraceus A. Sow thistle 



Trifotium procumbens A. Hop clover 



Verbena braoteosa P. Bracted verbena 



Veronica peregri/na A. Speedwell 



Vida saliva A. Vetch , 



Achillea millefolium P. Yarrow 



A. Annual. 



B. Biennial. 

 P. Perennial. 



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