Weeds Identification Gallery

Coast Fiddleneck

  • Amsinckia menziesii var. intermedia
  • Borage Family: Boraginaceae
Updated: 10/2025

Coast fiddleneck is a native winter annual with upright stems, found throughout California to about 5600 feet (1700 m). It inhabits agricultural land and other disturbed areas. Of the many Amsinckia species and varieties in California, coast fiddleneck is most often reported as a weed, although it is a desirable component of wildlands. Coast fiddleneck fruits can be toxic to livestock when consumed in quantity. Poisonings most often occur when livestock ingest contaminated grain or feed.

Habitat

Grasslands, pastures, roadsides, agronomic crop fields, orchards, vineyards, and disturbed open and often dry places.

Seedling

Cotyledons (seed leaves) are deeply lobed and "Y" shaped. Lobes are sparsely hairy and narrowly egg shaped with rounded tips. First and later leaves are long and narrow, with stiff hairs and smooth edges. Leaves are alternate to one another along the stem.

Young green plant with six narrow leaves on textured, dark soil background. Copyright information is at the bottom (Copyright 2007 The Regents of the University of California. All rights reserved.). Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources
Seedling. Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources

Young Plant

Young plants exist as rosettes until the flower stem develops.

A young green plant with long, slender leaves grows in sandy soil. Sparse grass surrounds it, suggesting a dry environment. Copyright information is at the bottom (Copyright 2007 The Regents of the University of California. All rights reserved.). Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources
Young plant. Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources

Mature Plant

Coast fiddleneck reaches up to 4 feet (1.2 meters) tall. Leaves are alternate to one another along the stem and are stalkless, except for the short-stalked lower leaves. Leaves are long and narrow to spear shaped with smooth edges and sparsely to moderately covered with stiff, bristly hair.

Mature plant showing hairy, lance-shaped leaves alternating on stem and small, orange-yellow flowers at the tips; . Credit: Jack Kelly Clark, UC IPM
Mature plant. Credit: Jack Kelly Clark, UC IPM

Flowers

Flowers bloom mostly from March through June. The distinctive flowering head curls like the neck of a fiddle and is lined on one side with small tubular yellow orange to pale yellow flowers.

Flower head showing orange-yellow curled flowers, 1X; . Credit: Jack Kelly Clark, UC IPM
Flower head. Credit: Jack Kelly Clark, UC IPM

Fruits

Fruits consist of four, erect, one-seeded nutlets that separate after dispersal. Sometimes only two to three nutlets develop to maturity.

Seed

Nutlets are gray, triangular to egg shaped, with a sharply textured or ridged surface. They are about 1/7 of an inch (3.5 mm) or less in diameter.

Eleven small, textured seeds arranged on a gray background. Each seed is rough, brown, and slightly wrinkled. A 1 millimeter scale indicates size and shows the seeds are 2 to 3 millimeters. Copyright information is at the bottom (Copyright 2007 The Regents of the University of California. All rights reserved.). Credit: James A. O'Brien, University of California
Seeds. Credit: James A. O'Brien, University of California

Reproduction

Reproduces by seed.

  • Heliotrope, Heliotropium spp.

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