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Tetraneuris argentea
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Tetraneuris
Species:	T. argentea
Binomial name
Tetraneuris argentea (A.Gray) Greene 1898
Synonyms
Synonymy Actinella argentea A.Gray 1849 Hymenoxys argentea (A.Gray) K.F.Parker Tetraneuris formosa Greene ex Wooton & Standl. Tetraneuris leptoclada (A.Gray) Greene Tetraneuris trinervata Greene Ptilepida argentea (A. Gray) A. Heller

Tetraneuris argentea, the perkysue, is a North American species of plants in the sunflower family. It grows in the southwestern United States, primarily in Arizona and New Mexico with additional populations in Utah, Colorado, and the Texas Panhandle.

Tetraneuris argentea is a perennial herb up to 42 cm (17 in) tall. It forms a branching underground caudex sometimes producing as many as 12 above-ground stems. One plant can produce as many as 30 flower heads. Each head has 8–14 yellow ray flowers surrounding 25-100 yellow disc flowers.

References

1. The Plant List, Tetraneuris argentea (A. Gray) Greene
2. Tropicos, Actinella argentea A. Gray
3. NRCS. "Tetraneuris argentea". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 9 December 2015.
4. Biota of North America Program 2014 county distribution map
5. SEINet Southwestern Biodiversity, Arizona chapter description, photos, distribution map
6. Flora of North America, Tetraneuris argentea (A. Gray) Greene, 1898.

External links

• photo of herbarium specimen at Missouri Botanical Garden, collected in New Mexico in 1847

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