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Overview

Comprehensive Description

Description

Annual or perennial herbs. Leaves opposite, divided or compound, namely 2-3-pinnatisect, 3-foliolate or pinnate. Leaflets or lobes varying from linear to broadly ovate. Capitula usually radiate. Phyllaries in 2 series; outer herbaceous, inner usually scarious. Receptacular scales present. Ray florets neuter, sometimes 0; disk florets bisexual. Rays yellow, orange, golden, white or 0. Achenes bilaterally flattened or 3-4(-5)-angled, linear to broadly obovate; margin often thickened or winged. Pappus of 0-5 barbed (forwardly or backwardly) bristles.
Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Mark Hyde, Bart Wursten and Petra Ballings

Source: Flora of Zimbabwe

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Physical Description

Diagnostic Description

Bidens

Annual or perennial herbs, less frequently shrubs or vines. Stems usually striate. Leaves opposite; blades simple or compound; petioles and rachis narrowly winged or absent. Inflorescences terminal, with one to numerous pedunculate capitula; capitula heterogamous, generally radiate or discoid, with numerous flowers; involucre crateriform, with 2 series of unequal phyllaries, the outer ones green and narrow, the inner ones brown, with hyaline margins. Marginal flowers 5-12, usually sterile, with the corolla ligulate, yellow, white, or orange. Disc flowers few or numerous, bisexual, usually yellow, tubular; stamens 5, the anthers generally black, connate, exserted; ovary inferior, unilocular, the style filiform, with 2 stigmatic branches. Achenes slightly compressed, glabrous or pubescent; pappus composed of 1-6 erect bristles, retrorsely barbate. A genus of about 75 species, mostly of Mexico, also from North America to South America and in the Antilles.

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Ecology

Associations

In Great Britain and/or Ireland:
Foodplant / miner
larva of Liriomyza strigata mines leaf of Bidens

Foodplant / internal feeder
larva of Napomyza lateralis feeds within stem of Bidens
Other: major host/prey

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:137Public Records:48
Specimens with Sequences:102Public Species:15
Specimens with Barcodes:102Public BINs:0
Species:31         
Species With Barcodes:27         
          
Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Bidens

Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Barcode data

Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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