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Canada Hawkweed
Hieracium kalmii		  
Family Aster  (Asteraceae)
Bloom Summer
Habitat Meadows, fields, roadsides, sandy soil
Status Non-Native
Cycle Perennial
Height 1-3 feet
Flower 4-10 dandelion-like, bright yellow flowers abut 1" wide grow on a single stalk.  They typically only open one at a time.  It is a composite flower made up of 20-30 individual flowers.
Leaf Linear, coarse-toothed basal leaves 2-5" long. 
Notes This is one of about 15 species of hawkweed that grow in Michigan.  Flowers close at night and on cloudy days. 

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