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Centaurea solstitialis - L.

Common Name St. Barnaby's Thistle, Yellow star-thistle
Family Asteraceae or Compositae
USDA hardiness 5-9
Known Hazards There is a report that the plant causes brain lesions and a nervous syndrome called 'chewing disease' in horses[274].
Habitats Cultivated land and waste ground[100].
Range S. Europe to W. Asia. Occasionally established in S. and E. England[17].
Edibility Rating    (1 of 5)
Other Uses    (0 of 5)
Weed Potential Yes
Medicinal Rating    (1 of 5)
Care (info)
Fully Hardy Well drained soil Moist Soil Full sun
Centaurea solstitialis St. Barnaby


Centaurea solstitialis St. Barnaby
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Summary


Physical Characteristics

 icon of manicon of flower
Centaurea solstitialis is a ANNUAL/BIENNIAL growing to 0.6 m (2ft).
It is hardy to zone (UK) 6. It is in flower from July to September, and the seeds ripen from September to October. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies, Lepidoptera (Moths & Butterflies). The plant is self-fertile.
It is noted for attracting wildlife.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: acid, neutral and basic (alkaline) soils and can grow in very alkaline soils.
It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

UK Hardiness Map US Hardiness Map

Synonyms

Habitats

 Cultivated Beds;

Edible Uses

Edible Parts: Leaves
Edible Uses:

The plant is eaten as a vegetable[100]. The part used is not specified.

References

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.
Lithontripic

The powdered seed is used as a remedy for stone[4]. The powdered root is said to be a cure for fistula and gravel[4].

References

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FOOD FOREST PLANTS

Other Uses

None known

Special Uses

Attracts Wildlife

References

Cultivation details

Succeeds in ordinary garden soil[1, 200]. Prefers a well-drained fertile soil and a sunny position[200]. Tolerates dry, low fertility and alkaline soils[200]. A good bee and butterfly plant the flowers are rich in nectar[171]. Members of this genus are rarely if ever troubled by browsing deer[233].

References

Temperature Converter

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Propagation

Seed - sow April in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and plant them out into their permanent positions in the summer. If you have sufficient seed it can be sown in situ in the spring, and an autumn swing in situ might also be worth trying.

Other Names

If available other names are mentioned here

St. Barnaby's Thistle, Yellow star-thistle, golden starthistle, yellow cockspur, Barnaby Thistle

Found In

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

Argentina, Australia, Britain, Chile, Europe, France, Greece, Italy, Mediterranean, North America, South America, Spain, Tasmania, Turkey, Uruguay, USA.

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.

Introduced in several parts of the world, including Australia, Argentina, Chile, and the USA where it can become an invasive species and noxious weed. The plant is considered an invasive species in the US states: California, Oregon, Washington, Idaho, Utah, and New Jersey.

Conservation Status

IUCN Red List of Threatened Plants Status : This taxon has not yet been assessed.

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Centaurea acaulis Perennial0.0 -  LMHNDM00 
Centaurea calcitrapaCommon Star Thistle, Red star-thistleBiennial0.6 0-0  LMHNDM11 
Centaurea chamaerhaponticum  0.0 -  LMHNDM20 
Centaurea cyanusCornflower, Garden cornflower, Blue Bottle, CornflowerAnnual1.0 0-0 FLMHNDM222
Centaurea depressaIranian knapweedAnnual/Perennial0.3 6-9  LMHNDM20 
Centaurea ibericaIberian Star Thistle, Iberian knapweedBiennial0.9 5-9  LMHNDM120
Centaurea jaceaBrown KnapweedPerennial0.6 5-9  LMHNDM110
Centaurea melitensisMaltese Star ThistleAnnual0.5 6-9  LMHNDM010
Centaurea montanaMountain Cornflower, Perennial cornflower, Mountain BluetPerennial0.5 3-9 FLMHNDM02 
Centaurea nigraBlack Knapweed, Lesser knapweedPerennial0.6 4-8  LMHNDM120
Centaurea raphanina Perennial0.0 -  LMHNDM10 
Centaurea scabiosaGreater KnapweedPerennial0.9 4-8  LMHNDM02 

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Author

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Botanical References

17100

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Subject : Centaurea solstitialis  
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