- Source: Helenium chihuahuense
Helenium chihuahuense is a North American perennial plant in the sunflower family. It has been found only in the state of Chihuahua in northwestern Mexico.
Helenium chihuahuense is a branching annual herb up to 78 cm (31.2 inches) tall with thick rootstocks producing only one stem with a single flower head. The leaves are long, narrow and irregularly lobed. The head is spherical or egg-shaped, with many disc flowers, each yellow with purple tips. These are surrounded by about 14-15 yellow ray flowers.
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Photo of herbarium specimen at Missouri Botanical Garden, collected in Chihuahua in 1936, isotype of Helenium chihuahuense