- Alternate, pinnately lobed to pinnatifid, sessile or with winged petioles, glabrous to scabrous above, with spines from veins, pubescent below . Leaf bases decurrent on stem. Leaf lobes ending in strong spine. Larger leaves to +35cm long, reduced gradually towards apex of stem.
Upper surface of leaf.
Lower surface of leaf.
- Typically single or double flower heads terminating stems.
- To +3cm tall, 4cm wide, vase-shaped. Phyllaries imbricate, with a spine tip, arachnoid pubescent.
- Corolla pink to rose, tubular, to 3.5cm long. Style 1, exserted beyond corolla. Achenes to 6mm long, 2mm wide. Pappus of plumose bristles.
- Many people, including myself, beat up on
as being a horrible exotic pest but
cannot be far behind. This is a very common plant. Its spiny leaves and stems are annoying at best. It is a pretty plant but doesn't make a good specimen for cultivation because of its prickles and weedy habit.
The fruits (seeds) are carried great distances by the wind with the aid of their plumose bristles.
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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 entities and synonyms 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.
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