Helenium linifolium

Helenium linifolium is a North American perennial plant in the Sunflower Family, commonly known as slimleaf sneezeweed.[1] It is found only in southern Texas.[2][3]

Helenium linifolium
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Helenieae
Genus:
Helenium
Species:
H. linifolium
Binomial name
Helenium linifolium
Rydb. 1915

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.[1]

References
  1. Flora of North America, Helenium linifolium Rydberg, 1915. Slimleaf sneezeweed
  2. Biota of North America Program 2014 county distribution map
  3. Turner, B. L. 2013. The comps of Mexico. A systematic account of the family Asteraceae (chapter 11: tribe Helenieae). Phytologia Memoirs 16: 1–100


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