Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Yellow Star Thistle

Centaurea solstitialis


The introduction of Centaurea solstitialis, Yellow Star-thistle, in North America probably occurred in California sometime after the start of the California Gold Rush, as a fodder seed contaminant in imported Chilean-harvested Alfalfa seed, also known as Chilean Clover (Trifolium macraei).[4] Yellow star-thistle was dispersed into agricultural fields in California, and immediately took hold in the state's Mediterranean-type climate areas. Human factors such as mowing, land grading for development and roads, domestic animal grazing, and disturbance of the soil surface for agricultural tillage and wildland firebreaks have and continue to contribute to the successful thriving and spread of this plant. Yellow starthistle is now a very common sight in vacant lots and fields, along roadsides and trails,in pastures and ranch lands, and in parks, open-space preserves and natural areas

1 Species ID Suggestions

Yellow Star-Thistle
Centaurea solstitialis Centaurea solstitialis

Sign in to suggest organism ID

1 Comment

KostasZontanos 7 years ago

The scientific name of yellow star-thistle is Centaurea solsitialis, not heterocampa biundata

Spotted by

California, USA

Spotted on Aug 3, 2012
Submitted on Aug 3, 2012

Noah Guardians
Noah Sponsors
join Project Noah Team

Join the Project Noah Team