Conringia orientalis

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Conringia orientalis eF.jpg

|genus = Conringia

|species = orientalis

|authority = (L.) Dumort.

}}

Conringia orientalis is a species of flowering plant in the mustard family known by the common name hare's ear mustard.{{PLANTS|id=COOR|taxon=Conringia orientalis|accessdate=17 January 2016}} It is native to Eurasia but it is known elsewhere as an introduced species and sometimes a noxious weed. It is weedy in its native range and also in North America, where it is a widespread invasive species, especially in central Canada.[http://www.nappo.org/PRA-sheets/Conringiaorientalis.pdf North American Plant Protection Organization] {{webarchive|url=https://web.archive.org/web/20090106162511/http://www.nappo.org/PRA-sheets/Conringiaorientalis.pdf |date=2009-01-06 }}

It is an annual herb producing an unbranched erect stem {{convert|30|to|70|cm|in|abbr=off}} in height. The thick, waxy leaves are generally oval in shape, up to {{convert|9|cm|in|frac=2|abbr=off}} long, and clasp the stem at their bases. The flower is enclosed in pointed sepals and has yellow, clawed petals about {{convert|1|cm|in|frac=3|abbr=off}} long. The fruit is a beaded silique up to {{convert|13|cm|in|0|abbr=off}} long. The plant is known to be toxic to livestock.