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Identify by flower color:

Pink, magenta, or red flowers
picture of wild four o'clock picture of policeman's helmet flower picture of herb-Robert flowers picture of houndstongue flowers picture of black knapweed flower
four o'clock, wild helmet, policeman's herb-Robert houndstongue knapweed, black
picture of brown knapweed flower picture of diffuse knapweed flower picture of meadow knapweed flower a picture of a Russian knapweed flower picture of spotted knapweed flower
knapweed, brown knapweed, diffuse knapweed, meadow knapweed, Russian knapweed, spotted
picture of volchin knapweed picture of kudzu picture of purple loosestrife flower spike picture of clary sage flowers picture of a purple starthistle flower
knapweed, Vochin kudzu loosestrife, purple sage, clary starthistle, purple
close up of swainsonpea fruits and flowers a picture of a bull thistle flower link to Canada thistle page picture of an Italian thistle flower picture of musk thistle flower
swainsonpea thistle, bull thistle, Canada thistle, Italian thistle, musk
picture of a plumeless thistle flower link to Scotch thistle page picture of a milk thistle flower a picture of hairy willow herb
thistle, plumeless thistle,
Scotch		 thistle, slenderflower thistle, milk willow-herb, hairy

Purple or blue flowers
picture of blueweed flowers picture of annual bugloss flowers picture of common bugloss picture of and link to butterfly bush page picture of common crupina
blueweed bugloss, annual bugloss, common butterfly bush crupina, common
picture of meadow clary picture of silverleaf nightshade      

clary, meadow

 nightshade, silverleaf      

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