Centaurea: from the Latin and a reference to the Centaur Chiron who was supposed to have discovered the medicinal uses of a plant in Greece that came to be called Centaury (contributed by Cynthia Powell)
calcitrapa: from the Latin calcitro, "to kick," caltrop, a four-pointed weapon usually positioned on the ground to impede enemy movements (contributed by Cynthia Powell)
[Cal-IPC] Invasive: Centaurea calcitrapa (purple starthistle) grows as an annual, biennial or perennial (family Asteraceae) in fields, roadsides, disturbed open sites, grasslands, overgrazed rangelands, and logged areas in the northern and central coast ranges of California. Centaurea species may produce allelopathic effects and are highly competitive with other plants, often displacing desired vegetation.
Cal-IPC Rating: Moderate (contributed by Mary Ann Machi)
[Wikipedia] Europe native, Noxious weed: Centaurea calcitrapa is a species of flowering plant known by several common names, including red star-thistle and purple star thistle. It is native to Europe but is rarely found there, it is known across the globe as an introduced species and often a noxious weed. The species name calcitrapa comes from the word caltrop, a type of weapon covered in sharp spikes. (contributed by Mary Ann Machi)
/app/up/mg/503/th/mg150903-0.jpg:!/app/up/mg/265/th/mg79561-0.jpg:!/app/up/mg/572/th/mg171640-0.jpg:!/app/up/io/221/th/io66499-0.jpg:!/app/up/io/137/th/io41204-1.jpg:!/app/up/io/236/th/io70895-0.jpg:!/app/up/io/59/th/io17730-0.jpg:!/app/up/io/58/th/io17679-0.jpg:!/app/up/mg/504/th/mg151451-0.jpg:!/app/up/mg/565/th/mg169675-0.jpg:!/app/up/mg/615/th/mg184767-0.jpg:!/app/up/mg/615/th/mg184767-1.jpg:!0000 0000 0509 1657:!
2021 R.A. Chasey:!2019 MCOSD EDRR:!2022 R.A. Chasey:!2022 Morgan Stewart:!2020 Michelle Karle:!2022 Lenihan Mazur:!2019 Danielle Carney:!2019 Lenihan Mazur:!2021 Cleopatra Tuday:!2022 MCOSD Restoration Crew:!2022 Ryan O'Dell:!2022 Ryan O'Dell:!2009 Barry Rice:!
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2023. Berkeley, California:The Calflora Database
[a non-profit organization].Available: