Blue Toadflax

Linaria canadensis

Basic Information

Family: Scrophulariaceae

Genus: linaria

Plant ID (slug): linaria-canadensis

Numeric ID: 24425

USDA Hardiness: 4-8

Ratings

Physical Characteristics

Linaria canadensis is a ANNUAL/BIENNIAL growing to 0.6 m (2ft). See above for USDA hardiness. It is hardy to UK zone 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: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

Distribution

N. America - Nova Scotia to Florida, west to Minnesota, Oregon, Texas and California

Habitats

Cultivated Beds;

Edible Uses

None known

Medicinal Uses

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