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The smooth hawksbeard, Crepis capillaris, is a species in the dandelion tribe within the sunflower family, native to Europe. It has become naturalized in other lands and is regarded as a weed in some places.
Crepis capillaris is a low, annual plant commonly found on roadsides, the stems often trailing along the ground but sometimes erect, the leaves sometimes forming a rosette. It flowers from July to September in the Northern Hemisphere, producing an array of numerous small flower heads. Each head has as many as 60 yellow ray florets but no disc florets.
- The Plant List Crepis capillaris (L.) Wallr.
- Altervista Flora Italiana, Radicchiella capillare, almeirôa, Grüner Pippau, grönfibbla, Crepis capillaris (L.) Wallr. includes photos and European distribution map
- Flora of North America, Smooth hawksbeard, crépis capillaire, Crepis capillaris (Linnaeus) Wallroth
- Biota of North America Program 2014 county distribution map
- "Crepis capillaris". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA).
- Jepson Manual Treatment of Crepis capillaris — invasive plant species.
- USDA Plants Profile for Crepis capillaris — invasive plant species.
- UC Calphotos gallery
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