| Author | (Rafinesque) H. Rock | |
| Distribution | Throughout the Coastal Plain and most of the Piedmont; scarce in the Mountains.
Native of Texas, now found as far as FL, MA, WI. Until recently, often considered to be native to the Eastern states, but Weakley (2018) indicates that it is not native east of TX. | |
| Abundance | Common to often locally abundant, except rare in the Mountains. | |
| Habitat | Roadsides, fields, pastures, barnyards, disturbed ground, waste places, campus weed. Many a vacant lot or cow pasture is yellow with the flowering heads of this species. | |
| Phenology | Flowering and fruiting May-December. | |
| Identification | Yellow Sneezeweed is a very familiar weed of roadsides and pastures, among other disturbed places. It is a much-branched and compact plant, mostly a foot or less tall (due to mowing), but reportedly may attain 2-3 feet tall. The basal leaves are absent at flowering; the stem leaves are linear, glandular-punctate, and fragrant. The heads have yellow rays and darker orange-yellow discs. | |
| Taxonomic Comments | Our plants are the var. amarum.
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| Other Common Name(s) | Bitter Sneezeweed, Bitterweed | |
| State Rank | SE | |
| Global Rank | G5 | |
| State Status | | |
| US Status | | |
| USACE-agcp | FACU link |
| USACE-emp | FACU link |
