Senecio integerrimus is a species of flowering plant in the aster family known by the common names lambstongue ragwort[1] 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 20 to 70 centimeters (8 to 27+1⁄2 in) tall from a caudex with fleshy shallow roots.[2] The linear to lance-shaped or triangular leaves are primarily basal,[2] with blades up to 25 cm (10 in) long. The herbage is slightly hairy to woolly or cobwebby. The inflorescence bears several flower heads in a cluster,[2] 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.
| Senecio integerrimus | |
|---|---|
| |
| S. integerrimus with unidentified Coleoptera | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Senecio |
| Species: | S. integerrimus
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| Binomial name | |
| Senecio integerrimus | |
References
edit- ^ NRCS. "Senecio integerrimus". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 9 November 2015.
- ^ a b c Taylor, Ronald J. (1994) [1992]. Sagebrush Country: A Wildflower Sanctuary (rev. ed.). Missoula, MT: Mountain Press Pub. Co. p. 156. ISBN 0-87842-280-3. OCLC 25708726.
External links
edit
- Jepson Manual Treatment
- USDA Plants Profile
- Flora of North America
- Washington Burke Museum
- Photo gallery
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