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: Known from Val Verde and Zapata counties, Texas, southern Louisiana, and northern Mexico (Nuevo Leon, Sonora, and Coahuila).

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Ecology

Habitat

Comments: Wet, silty clay loams on streamsides, in creekbeds, irrigation channels, and roadside drainage ditches.

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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: Fewer than 15 extant element occurrences, many historic occurrences which have not been verified recently.

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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: A fairly widespread but rarely encountered species of wetland habitats. Its range is from southern Louisiana as to southern Texas and northern Mexico, but fewer than 15 occurrences are known, and many historic populations have not been verified recently. Its tendency to grow in habitats subject to disturbance and human use (roadside and irrigation ditches, creekbeds, etc.) makes each isolated population highly vulnerable.

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Threats

Comments: Wetland habitats in this xeric region are subject to a variety of threats.

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Management

Biological Research Needs: Population biology, habitat needs.

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Wikipedia

Physostegia correllii

Physostegia correllii is a species of flowering plant in the mint family known by the common name Correll's false dragonhead. It is native to northern Mexico, as well as Texas and Louisiana in the United States. Most occurrences are historical and have not been seen recently. Today it is known from one location in Travis County, Texas, and two or three locations in Louisiana, and its current distribution in Mexico is unknown.[1]

This rhizomatous[1] perennial herb may reach heights over 2 meters. It produces spikes of flowers in June through September. The flowers are purple with darker streaks.[2] The flowers are pollinated by bumblebees.[1]

This plant is a wetland species that can be found today in wet, disturbed areas such as drainage ditches.[1]

References[edit]

  1. ^ a b c d Physostegia correllii. Center for Plant Conservation.
  2. ^ Physostegia correllii. The Nature Conservancy.
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Names and Taxonomy

Taxonomy

Comments: A good species in a genus of about a dozen species from Canada to Mexico.

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