It is a biennial or perennial herb, up to 90 cm height, with 5–25 cm long, lanceolate leaves. The flowers are violet, purple or rarely white, and stand in terminal racemes.3 The flowers are very fragrant.4
"Matthiola maderensis". Tropicos. Missouri Botanical Garden. Retrieved 28 January 2019. https://www.tropicos.org/NameSearch.aspx?projectid=&name=Matthiola+maderensis ↩
Matthiola maderensis, botany.cz https://botany.cz/en/matthiola-maderensis/ ↩
"Matthiola maderensis". Rareplants. Retrieved 28 January 2019. http://www.rareplants.de/shop/product.asp?P_ID=6593 ↩