[usually treated as singular] A sunflowerlike composite plant of the western US, with large oval leaves.
- ‘In addition to poison oak, look for the large elliptical leaves of mule-ears (Wyethia helenoides) growing here.’
- ‘Regardless of how you learn, the mule ears are a great group because they grow easily and put out an abundance of flowers.’
- ‘To left in front of the center group of mule ears are some blue flowers of silver lupine, lupinus argenteus.’
- ‘Other species include purple fritillary, Sierra iris, crimson columbine, slim larkspur, two kinds of lupines, mosquito-bills, and woolly mule ears.’
- ‘There are nine species of Indian paintbrush in Marin, two species of mule ears, three species of iris, two species of trillium, and five purplish larkspurs.’