File Size: 111 KB
Verbena bracteata  Lag. & Rodr.
Konza Prairie, Riley County, Kansas
Annual or short-lived perennial
Height: Prostrate or decumbent
Family: Verbenaceae - Vervain Family
Flowering Period:   June, July, August, September
Also Called: Bigbract verbena, large bracted vervain.
Stems: Generally several from base,widely branched, prostrate or decumbent, rarely erect, 4-25 inches long, stiff-hairy.
Leaves: Opposite, numerous, simple, lanceolate to ovate-lanceolate, .4 to 2.8 inches long and .25 to 1.2 inch wide, 3-lobed or sometimes pinnately incised, lateral lobes smaller than toothed central lobe, surfaces stiff-hairy.
Inflorescences: Spike, terminal, 1 to 8 inches long, 2/5 to 4/5 inch in diameter, often ascending, stiff-hairy; bracts 1/3 to 3/5 inch long, 2-3 times as long as calyx.
Flowers: Calyx 5-lobed, 1/8 to 1/6 inch long, stiff-hairy; corolla bluish to lavender or purple, 5-lobed, finely pubescent outside; stamens 5, arranged in 2 sets.
Fruits: Nutlets 4, linear, 1/12 to 1/10 inch long, yellowish to reddish-brown, each 1-seeded.
Habitat: Disturbed sites, waste areas, prairies, overgrazed pastures, lawns, and roadsides; all soil types.
Distribution: Throughout Kansas.
Forage Value: Prostrate vervain is rarely grazed by livestock.
Uses: The Navajo used a poultice made from this plant to treat centipede bites.
Comments: A common weed that will spread rapidly in disturbed areas. Very drought-resistant. The tiny flowers are almost hidden by the conspicuous bracts.

Prostrate vervain
105 KB
Ottawa County, Kansas
Prostrate vervain
154 KB
Konza Prairie, Riley County, Kansas