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Atriplex confertifolia, the shadscale or spiny saltbush,[3] is a species of evergreen shrub in the family Amaranthaceae, which is native to the western United States and northern Mexico.[4][5]

Atriplex confertifolia
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Amaranthaceae
Genus:	Atriplex
Species:	A. confertifolia
Binomial name
Atriplex confertifolia Torr. & Frém.
Synonyms[1]
Atriplex collina Wooton & Standl. Atriplex jonesii Standl. Atriplex sabulosa M.E.Jones 1903 not Rouy 1890[2] Atriplex subconferta Rydb. Obione confertifolia Torr. & Frém. Obione rigida Torr. & Frém.

Description

The height of Atriplex confertifolia varies from 1–3 ft (0.30–0.91 m). Shadscale fruits and leaves provide important winter browse for domestic livestock and native herbivores. Compared to fourwing saltbush (Atriplex canescens), shadscale has shorter and wider leaves and the fruit does not have four wings (although it may have two wings in a "V" shape).[6]

This species blooms from March to June.

Maximum osmotic pressure has been reported in Atriplex conf. where it is about 202.5 atm.

Distribution and habitat

Shadscale is a common, often dominant, shrub in the lowest and driest areas of the Great Basin. It prefers sandy, well-drained soils and it is tolerant of moderately saline conditions. Its habitats include alkaline desert valleys, hillsides, and bluffs.[7]

References

External links

• USDA Plants Profile for Atriplex confertifolia (shadscale)
• Jepson Manual eFlora (TJM2) treatment of Atriplex confertifolia
• Missouri Botanical Garden: photo of herbarium isotype specimen of Atriplex subconferta (synonym of A. confertifolia) — collected in Wyoming (1911).
• Atriplex confertifolia in the CalPhotos photo database, University of California, Berkeley

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