Helenium apterum

Helenium apterum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Helenium
Species:	H. apterum
Binomial name
	Helenium apterum; (S.F.Blake) Bierner 1972
Synonyms
	Hecubaea aptera S.F.Blake 1924;

Helenium apterum is a North American perennial plant in the sunflower family. It has been found only in the state of Durango in northwestern Mexico.^[3]^[4] 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 apterum is an perennial herb up to 100 cm (40 inches) tall with thick rootstocks producing only one stem with a single flower head. Leaves at the base can be up to 30 cm (1 foot) long, the leaves higher on the stem much smaller. The head is about 4 cm (1.6 inches) across, with a hemispherical yellow disc surrounded by about 14 yellow ray flowers.^[3]

References

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[1] The Plant List, Helenium apterum (S.F.Blake) Bierner

[2] Bierner, Mark William. 1972. Sida 5(1): 47

[e-3] Blake, Sydney Fay. 1924. Contributions from the United States National Herbarium 22(8): 649–650 as Hecubaea aptera

[4] Tropicos, Hecubaea aptera S.F. Blake

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