Helenium linifolium

{{Short description|Species of flowering plant}}

{{Speciesbox

|image =

|genus = Helenium

|species = linifolium

|authority = Rydb. 1915

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Helenium linifolium is a North American perennial plant in the sunflower family, commonly known as slimleaf sneezeweed. It is found only in southern Texas.[http://bonap.net/MapGallery/County/Helenium%20linifolium.png Biota of North America Program 2014 county distribution map]Turner, B. L. 2013. The comps of Mexico. A systematic account of the family Asteraceae (chapter 11: tribe Helenieae). Phytologia Memoirs 16: 1–100

Helenium linifolium is an annual herb up to 80 cm (32 inches) tall, with wings running down the sides of the stems. Leaves are long and narrow, almost thread-like, merging with the wings on the stem. One plant can have 100 or more small spherical or egg-shaped flower heads. Each head has up to 500 disc flowers, each yellow-green toward the bottom but brown or purple toward the tip. There are also 8-9 red or yellow ray flowers.[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066854 Flora of North America, Helenium linifolium Rydberg, 1915. Slimleaf sneezeweed ]