Rough star-thistle (knapweed)

Centaurea aspera L.


Common noun: Rough Star-thistle, Knapweed

Scientific noun: Centaurea aspera L.

Family: Daisy family – compositae.

Habitat: Dry places with grass. Uncultivated lands.


Detail of the plant with the inflorescent. Daniel M. Bou

Characteristics of Knapweed

A very ligneous plant till 50 cm tall. Stems hairy below. Very rough leaves; lower ones stalked and divided; upper ones without stalks toothed or undivided. Big,single flower- heads till 2 cm wide of white or purple flowers.

Picking up and storing: The plant must be collected in Spring when in full bloom. It must be stored in dark place in a clean airtight container.


Medicinal propertie of Knapweed

Internal use

Hypoglucemiant: (It diminishes the quantity of sugar in the blood and urine) Infusion of the flower heads twice a day, in the morning and before going to bed. It is a very bitter infusion that must be taken without any kind of sugar or sweet. It is advisable to analyze the levels of sugar in the body after two weeks of treatment to decide the amount of plant that must must be used in the infusion.

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Written by Editorial Botanical-online team in charge of content writing

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Botanical-online is an informative page that describes, among other topics, the traditional uses of plants from a therapeutic point of view. Their descriptions do not replace professional advice. Botanical-online is not responsible for self-medication and recommends consulting with the physician.