Asplenium biscaynianum (D.C. Eaton) A.A. Eaton (pro sp.) — Details

Biscayne Spleenwort learn more about names for this taxon

Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Global Range: Known only from southern peninsular Florida near Miami on Miami oolite formation. Was previously more abundant than at present.

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Ecology

Habitat

Comments: Found only within hammock vegetation growing on limestone sinkhole walls or edges near Miami, Florida. Population in Costello Hammock very local and scattered near old burn site in south central region of park.

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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: 1 - 5

Comments: Only known from Deering Estate, Cutler and Owissa-Bauer and Costello Hammocks near Homestead.

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N1 - Critically Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: GNA - Not Applicable

Reasons: Florida endemic, which is very rare and localized; the Florida Natural Areas Inventory database contains 3 occurrences in its database. This species can be sensitive to over-collection and is easily destroyed by fire and direct sunlight. Rapid development of south Florida threatens this species.

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Threats

Comments: Found only at Deering Estate, Owissa-Bauer and Costello Hammocks. All sites are parks within Dade County park system, but collectors could easily extirpate this species in 1 afternoon.

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Management

Biological Research Needs: Additional sites may be as yet unknown in some of the more remote hammocks on Long Pine Key in Everglades Nat'l Park.

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