Overview

Distribution

National Distribution

Mexico

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Global Range: Southeastern Arizona (mountains of Cochise, Santa Cruz and Pima counties) and northern Mexico (Sonora and Chihuahua).

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Physical Description

Morphology

Description

Annuals, 10–60+ cm. Leaf blades lance-elliptic or oblanceolate to lance-linear, 25–50+ × 3–12+ mm, lengths 3–4(–6+) times widths, margins ± dentate or entire. Peduncles 4–30+ mm. Outer phyllaries 5, connate 0–1/6 their lengths, ovate to elliptic, 4–6+ mm. Ray florets 7–12; corollas yellow, laminae oblong-elliptic, 1.2–1.5+ × 0.7–1+ mm. Disc florets 8–10+. Fruits 3–3.5+ mm. 2n = 60.
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Ecology

Habitat

Comments: Canyons, hillsides and streambanks, mainly Upper Sonoran Zone but straggling to margins of the desert; often on limestone, in Arizona at 4000-5500 feet.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Melampodium longicorne

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Melampodium longicorne

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Mexico

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G3 - Vulnerable

Reasons: Melampodium longicorne is in canyons, on hillsides and streambanks, in southeastern Arizona and northern Sonora and Chihuahua in Mexico.

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