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Verbena urticifolia  L.
Konza Prairie, Riley County, Kansas
Height: 2-7 feet
Family: Verbenaceae - Vervain Family
Flowering Period:   June, July, August, September
Also Called: White vervain, nettle-leaved vervain.
Stems: Erect, solitary, slender, simple or much branched, bristly-hairy to nearly glabrous.
Leaves: Opposite, simple, broadly lanceolate or oblong-ovate, 3 to 8 inches long, 1 to 4.8 inches wide, glabrous or with scattered soft-hairy; margins coarsely toothed; tips pointed; stalks .5 to 1.5 inches long.
Inflorescences: Spikes, slender, arranged loosely, panicle-like, sparsely flowered, terminal; flowers remotely spaced; bracts at base of spikes inconspicuous; bracts below each flower inconspicuous. .
Flowers: Calyces less than 1/10 inch long, pubescent; lobes awl-shaped, short, nearly equal, not united; corollas white, tube less than 1/12 inch long, barely extending beyond calyx, 5-lobed; lobes blunt; stamens 4.
Fruits: 4 nutlets, to 1/12 inch long, each 1-seeded.
Habitat: Woods, thickets, moist fields, waste areas, pastures, roadsides, and stream banks; heavy soils.
Distribution: East 2/3 of Kansas.

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