Senecio integerrimus

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Senecio integerrimus 7466.JPG

|image_caption = S. integerrimus with unidentified Coleoptera

|status = {{TNCStatus}}

|status_system = TNC

|taxon = Senecio integerrimus

|authority = Nutt.

}}

Senecio integerrimus is a species of flowering plant in the aster family known by the common names lambstongue ragwort{{PLANTS|id=SEIN2|taxon=Senecio integerrimus|access-date=9 November 2015}} and tall western groundsel. It is native to western and central North America, where it grows in grassland, forest, and other habitat. It is a biennial or perennial herb producing one or a few erect stems {{Convert|20 to 70|cm|sp=us|frac=2}} tall from a caudex with fleshy shallow roots.{{Cite book|last=Taylor|first=Ronald J.|url=https://www.worldcat.org/oclc/25708726|title=Sagebrush Country: A Wildflower Sanctuary|publisher=Mountain Press Pub. Co|year=1994|isbn=0-87842-280-3|edition=rev.|location=Missoula, MT|pages=156|language=en|oclc=25708726|orig-year=1992}} The linear to lance-shaped or triangular leaves are primarily basal, with blades up to {{Convert|25|cm|abbr=on|frac=2}} long. The herbage is slightly hairy to woolly or cobwebby. The inflorescence bears several flower heads in a cluster, the middle, terminal head often largest and held on a shorter peduncle, making the cluster look flat. The heads contain many disc florets and usually 8 or 13 ray florets which may be yellow to cream to white in color. Some heads lack ray florets.