''Nuttallanthus canadensis'', the blue toadflax, Canada toadflax, or old-field toadflax, is a species of '' Nuttallanthus'' in the family

Plantaginaceae Plantaginaceae, the plantain family, is a large, diverse family of flowering plants in the order Lamiales that includes common flowers such as snapdragon and foxglove. It is unrelated to the banana-like fruit also called "plantain." In older cl ...

, native to eastern North America from

Ontario Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central C ...

east to

Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...

and south to

Texas Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by ...

and

Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...

.USDA Plants Profile
''Nuttallanthus canadensis''
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Description

It is an

annual Annual may refer to: *Annual publication, periodical publications appearing regularly once per year ** Yearbook ** Literary annual *Annual plant *Annual report *Annual giving *Annual, Morocco, a settlement in northeastern Morocco *Annuals (band), ...

or biennial plant growing to 25–80 cm tall, with slender, erect flowering stems. The leaves are slender, 15–30 mm long and 1–2.5 mm broad. The flowers are purple to off-white, 10–15 mm long, appearing from mid spring to late summer.Huxley, A, ed. (1992). ''New RHS Dictionary of Gardening''.

Distribution and habitat

It is grown as an

ornamental plant Ornamental plants or garden plants are plants that are primarily grown for their beauty but also for qualities such as scent or how they shape physical space. Many flowering plants and garden varieties tend to be specially bred cultivars that ...

in its native area. It has been introduced to western North America and

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...

, and is now locally naturalized, from

Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered o ...

south to

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

, and also in

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...

. It typically grows in bare areas and

grassland A grassland is an area where the vegetation is dominated by grasses ( Poaceae). However, sedge ( Cyperaceae) and rush ( Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur na ...

Ecology

The plant is a nectar source for bees and butterflies. It supports the larvae of the

common buckeye ''Junonia coenia'', known as the common buckeye or buckeye, is a butterfly in the family Nymphalidae. It is found in the United States east of the Rocky Mountains and in Mexico. Its habitat is open areas with low vegetation and some bare ground. ...

. Leaves of the plant are also a food source for caterpillars.

References

External links

Jepson Manual treatment: ''Linaria canadensis'' (''Nuttallanthus canadensis'')Plants For A Future: ''Linaria canadensis''
Plantaginaceae Flora of Eastern Canada Flora of the Eastern United States Flora of Mexico Flora of South America Garden plants of North America Plants described in 1753 Taxa named by Carl Linnaeus {{Plantaginaceae-stub