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Linaria canadensis - (L.)Dum.Cours.

Common Name Blue Toadflax
Family Scrophulariaceae
USDA hardiness 4-8
Known Hazards None known
Habitats Dry sterile or sandy soils, often a weed in sandy loams[43].
Range N. America - Nova Scotia to Florida, west to Minnesota, Oregon, Texas and California
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Well drained soil Moist Soil Full sun
Linaria canadensis Blue Toadflax


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Linaria canadensis Blue Toadflax
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Summary


Physical Characteristics

 icon of manicon of flower
Linaria canadensis is a ANNUAL/BIENNIAL growing to 0.6 m (2ft).
It is hardy to zone (UK) 4. The species is hermaphrodite (has both male and female organs) Suitable for: light (sandy) and medium (loamy) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

Synonyms

Habitats

 Cultivated Beds;

Edible Uses

None known

Medicinal Uses



Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Antihaemorrhoidal;  Diuretic;  Laxative.

The leaves are antihaemorrhoidal, diuretic and laxative[61, 254]. They are applied externally in the treatment of haemorrhoids[254].

Other Uses

None known

Cultivation details

A very drought resistant plant once established, it thrives in a poor gravelly soil[200]. Nitrogen-rich soils produce excessive leaf growth at the expense of flowering[200]. Prefers a sunny position[200].

Propagation

Seed - sow spring in situ[200]. An autumn sowing can also be made in areas with mild winters[200]. This sowing will produce larger plants.

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Castilleja linariaefoliaWyoming Indian Paintbrush12
Linaria vulgarisYellow Toadflax, Butter and eggs12

 

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Expert comment

Author

(L.)Dum.Cours.

Botanical References

4350200

Links / References

For a list of references used on this page please go here

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Subject : Linaria canadensis  
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