# Xanthisma junceum

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***Xanthisma junceum*** is a species of flowering plant in the family [Asteraceae](/source/Asteraceae) known by the common names **rush bristleweed** or **rush-like bristleweed**. It is native to northern Mexico and it occurs in the United States only as far north as [San Diego County, California](/source/San_Diego_County,_California). It grows in coastal and inland slopes and canyons. It is a perennial herb growing erect to 1 m in height. The linear leaves are mostly located at the base of the plant, each 1–2 cm long and toothed or cut into bristle-tipped lobes. The [inflorescence](/source/Inflorescence) bears one or more [flower heads](/source/Head_(botany)) lined with glandular, bristle-tipped [phyllaries](/source/Bract). The head has a center of many yellow disc florets and a fringe of 15 to 25 yellow ray florets each about 1/2 cm long. The fruit is a hairy [achene](/source/Achene) 2–3 mm long tipped with a [pappus](/source/Pappus_(flower_structure)).

## External links

- [Jepson Manual Treatment](http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1560,1573)
- [USDA Plants Profile](https://plants.usda.gov/java/profile?symbol=MAJU)
- [Flora of North America](http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250067829)
- [Photo gallery](http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Machaeranthera+juncea)

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Adapted from the Wikipedia article [Xanthisma junceum](https://en.wikipedia.org/wiki/Xanthisma_junceum) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Xanthisma_junceum?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.