Flowers: Yellow flower heads on auxiliary branches 2 to 3 inches long. San Juan Ck Channel, Michelson to Campus, 9-24-11. © Ron Vanderhoff.

Bristly Ox-tongue

Helminthotheca echioides

Coarse bristly, branched biennial herb, 1 1/2 to 4 feet tall. Flowering period: June to December

Exotic species, native to Europe and North Africa

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San Juan Ck Channel, Michelson to Campus, 9-24-11. © Ron Vanderhoff.
San Juan Ck Channel, Michelson to Campus, 9-24-11. © Ron Vanderhoff.

Leaf: Alternate, oblong, without stem, coarse toothed with short spines on the upper surface. Whispering Hills Trail, San Juan Hills, 12-11-11. © Ron Vanderhoff.
Whispering Hills Trail, San Juan Hills, 12-11-11 (56).jpg . © Ron Vanderhoff.

Whispering Hills Trail, San Juan Hills, 12-11-11. © Ron Vanderhoff.
Limestone Canyon, Irvine Ranch Conservancy. 10/7/12. © Peter J. Bryant

Limestone Canyon, Irvine Ranch Conservancy. 10/7/12. © Peter J. Bryant