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Hedyotis nigricans   (Lam. ) Fosberg
Konza Prairie, Riley County, Kansas
Height: 4-20 inches
Family: Rubiaceae - Madder Family
Flowering Period:   May, June, July, August, September
Stems: Erect or ascending, stiff, few to many, often branched, glabrous or slightly rough.
Leaves: Opposite, simple, sessile, numerous, ascending, mostly linear, .5 to 1.5 inches long, less than 1/8 inch wide, 1-nerved, mostly glabrous; margins entire, often curling downward; tips pointed; clusters of smaller leaves frequently occur in leaf axils.
Inflorescences: Dense clusters, terminal.
Flowers: Numerous, sessile or short-stalked; calyces with 4 distinct, green sepals; corollas funnel-shaped, 4-lobed, about 1/4 inch wide, white, pink or sometimes bluish purple, densely pubescent within and on lobes; stamens 4.
Fruits: Capsules, egg-shaped, partially enclosed in calyces; seeds small, black, covered with minute bumps.
Habitat: Open hillsides, open woods, roadsides, stream valleys; most abundant on dry, rocky, limestone soils.
Distribution: Throughout Kansas
Comments: Narrow-leaf bluets has a deep taproot and is hardy and adaptable to a wide range of conditions.

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