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This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all
Federal and State Noxious Weeds
This plant and the related entity italicized and indented above can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of
Weeds of the U.S.
densely hirsute proximally, glabrescent distally.
usually branched basally, (widely) branched distally, (1-) 3-7(-10) dm.
(rosettes persistent); petiole (broad) 2-10 cm; blade lyrate to pinnatisect, 2-30 cm × 10-50 (-100) mm, (margins serrate-dentate), 4-10 lobes each side.
sessile; blade (reduced in size distally, distalmost bractlike), base tapered, not auriculate or amplexicaul.
not paniculately branched.
widely spreading, 8-15 mm.
sepals 5-4.5 × 1-1.5 mm; petals pale yellow, fading or, sometimes, white, oblanceolate, 4-7 × 1.5-2(-2.5) mm, claw 1-3 mm, apex rounded; filaments 2.5-4 mm; anthers 1-1.3 mm; gynophore to 1 mm.
(shortly stipitate); widely spreading to ascending (not appressed to rachis), torulose, cylindric, 3-7 cm × 2-4(-5) mm; valvular segment with 6-12(-15) seeds per locule, 2.2-5 cm, terminal segment 1(-3)-seeded, (cylindric, stout), 10-20 mm.
light reddish brown or black, 1-1.2 mm diam.; seed coat prominently reticulate, mucilaginous when wetted.
Flowering Feb-Apr. Roadsides, waste places, old fields, washes, open desert areas intermixed with desert shrubs; 0-800 m; introduced; Ariz., Calif., Nev., Tex., Utah; Europe; Asia; Africa; introduced also in nw Mexico, Australia.
was first reported from California (Imperial, Riverside, and western San Bernardino counties) by W. L. Jepson ([1923-1925]), with the first collections appearing from southern California in 1941 (R. C. Rollins and I. A. Al-Shehbaz 1986), Arizona in 1959 (T. H. Kearney and R. H. Peebles 1960), Nevada in 1977, and Texas in 1978 (D. E. Lemke and R. D. Worthington 1991).
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Using the Photos in CalPhotos