Overview

Distribution

National Distribution

Mexico

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Global Range: It occurs in the Chihuahuan Desert. New Mexico near Rio Grande from Las Cruces south; Texas near Rio Grande from vicinity of El Paso to south edge of Hudspeth County and east to Hueco Mountains. In Mexico in Chihuahua. 1150-1350 m elevation.

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Ecology

Habitat

Comments: Sandy soils, usually in floodplains. 1150-1350 m elevation. Semi-desert grassland (Sivinski and Lightfoot 1994).

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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 6 - 20

Comments: Eighteen occurrences known: seven in New Mexico, eight in Texas, and three in Chihuahua, Mexico.

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Conservation

Conservation Status

National NatureServe Conservation Status

Mexico

Rounded National Status Rank: N1 - Critically Imperiled

United States

Rounded National Status Rank: N2 - Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: G2 - Imperiled

Reasons: Restricted to the Rio Grande River and adjacent valleys in southcentral New Mexico, western Texas, and adjacent Chihuahua, Mexico. There are 7 populations known in 2 counties of New Mexico, 8 in Texas (although only 3 are recently documented occurrences), and 3 in Chihuahua. Cactus collectors have decimated some populations. Urban development and road widening have destroyed some habitat.

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Threats

Comments: Most cacti subject to horticultural collecting. Sandy soils near the Rio Grande are often converted to irrigated farming.

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Names and Taxonomy

Taxonomy

Comments: Distinct species in a large and complex genus, many in the western hemisphere (number uncertain).

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