Turf Weeds was developed to provide weed management information and newsearch reports to turfgrass managers.  This site contains information on weed identification, chemical and cultural management of weeds, and current topics relevant to weed management in lawns and professional turf.  Turf Weeds was created  by Dr. Shawn Askew, Assistant Professor of Turfgrass Weed Science at Virginia Polytechnic Institute & State University.
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Plant Description:
Name:common toadflax
Scientific Name:Linaria canadensis
Family:Scrophulariaceae
Type:Broadleaf
Lifecycle:Biennial
Habit:Grows from 6-24 inches tall and blooms from April to September.
Leaves:Stems are up to 50 cm tall, erect, single or multiple from base, and typically simple or branching. Leaves of flowering stems are
alternate, linear, and wispy, up to 3.5 cm long and 3 mm wide, with margins slightly thickened.
Leaf Arrangement:Alternate
Characteristics:It is identified by its irregular blue flowers, its small thin leaves, and its basal spurs.
Flower Seed Head:Flowers are 1/4-1/2 inch long, pale blue-purple with lighter palate, small, on top of slender stalks, spurred, pubescent <br />internally. Upper lip erect, 2-lobed, and 5-6mm long. Lower lip 8mm long, 1.3cm broad, glabrous, and 3lobed. Lobes to 3mm long, 1mm broad (in flower), linear-oblong, acute, green, glandular pubescent.
Seed Fruit:Fruits are capsules 3mm long and broad, many seeded, and glabrous.
Where Found:Dry, sandy, or rocky soil, abandoned fields, roadsides, open ground, glades, bluffs, prairies, and railroads.

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