ROUGH AGALINIS
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Agalinis aspera   (Dougl. ex Benth.) Britton
Tallgrass Prairie National Preserve, Chase County, Kansas
Annual
Height: 8-30 inches
Family: Scrophulariaceae - Figwort Family
Flowering Period:   August, September
Also Called: Rough purple gerardia.
Stems: Erect, slender, branches nearly upright, slightly rough with short, stiff hairs.
Leaves: Opposite, sessile, ascending, narrowly linear to filiform, .75 to 1.5 inch long, less than 1/10 inch wide, rough short-hairy above, glabrous below; margins entire, often rolling downward; tips sharp pointed; clusters of small leaves in branch axils.
Inflorescences: Racemes of showy flowers on slender stalks in upper leaf axils.
Flowers: Calyces bell-shaped, lobes prominent, triangular, minutely pubescent; corollas 5-lobed, 3/4 to 1 inch long, pale purple; throats with 2 pale yellow lines and reddish or purplish spots; lobes spreading, usually glabrous inside, densely pubescent outside and on margins; stamens 4.
Fruits: Capsules, oblong to oval, about 1/3 inch long; seeds numerous, dark.
Habitat: Dry upland prairies and open woodlands.
Distribution: East 2/3 of Kansas.
Comments: Rough agalinis is partially parasitic on the roots of other plants. The foliage tends to turn black when drying.
 Related to Fine-leaf gerardia .

Rough agalinis inflorescence
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Tallgrass Prairie National Preserve, Chase County, Kansas