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Flaigg, Norman G.
Nuttallanthus canadensis (L.) D.A. Sutton
Canada toadflax, Blue Toadflax
USDA Symbol: nuca
USDA Native Status: Native to U.S.
Blue-violet bilaterally symmetrical flowers blooming in a raceme on a slender, erect stem with short, prostrate branches at base.
Flowers: corolla about 1/2 (1.3 cm) long, with a slender spur about 1/4 (6 mm) long projecting backward and curving down
This plant, once in the genus Linaria, has recently been placed in Nuttallanthus. Texas Toadflax (N. texanus), similar but less common in the Southwest, has larger flowers and seeds. Nuttallanthus species are often components of wildflower seed mixes, and
Plant CharacteristicsDuration: Annual Habit: Herb Flower:
Bloom InformationBloom Color: Blue
Bloom Time: Mar , Apr , May , Jun , Jul , Aug , Sep
AL , AR , CA , CT , DC , DE , FL , GA , IA , IL , IN , KS , LA , MA , MD , ME , MI , MN , MO , MS , NC , ND , NH , NJ , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , VA , VT , WA , WI , WV Native Distribution:
Southern Canada and throughout most of eastern United States west to Dakotas and Texas; in West, Washington south to California. Native Habitat:
Open, sandy areas where moist in spring. USDA Native Status: L48(N), CAN(N)
Growing ConditionsLight Requirement: Sun
Soil Moisture: Moist
Soil Description: Loam, Sand
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Record Modified: 2012-10-03
Research By: TWC Staff