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Bidens alba

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Bidens alba (L.) DC.

Family Name: Asteraceae (Compositae)
Synonyms: Bidens pilosa var. radiata, Coreopsis alba
Common Name: Shepherd's Needles, Butterfly Needles, Hairy Beggarticks, Spanish Needles

Name

Family Name
Genus Epithet
Species Epithet
Name Authority
Name Status (botanical)
Synonyms
Common Names

Classifications and Characteristics

Plant Growth Form Herbaceous Plant
Maximum Height 0.3 m to 1.2 m

Biogeography

Native Distribution Tropical America
Native Habitat Terrestrial (Disturbed Area / Open Ground)
Preferred Climate Zone Tropical
Local Conservation Status Non-native (Horticultural / Cultivated Only)

Description and Ethnobotany

Growth Form Perennial herb that grows up to 1.2 m tall.
Foliage Juvenile leaves are simple and opposite, while mature leaves are compound and composed of 3 - 9 oval leaflets with serrate leaf margin. Leaves (2.5 - 12.7 cm long, 6.4 cm wide) are hairy on the underside.
Stems Stems are ridged.
Flowers Daisy-like, compound flowers (2.5 cm wide) are composed of 5 white ray florets (petal-like structures) and numerous yellow disk florets (in the middle). The ray florets are obovate with a scalloped tip and a pleated texture.
Fruit Fruits are composed of star-shaped clusters of thin, black, ribbed seeds. The needle-like seeds have 2 - 6 barbed hooks at the end.

Fauna, Pollination and Dispersal

Fauna Pollination Dispersal Associated Fauna Butterfly-Attracting (Flower Nectar)
Pollination Method(s) Biotic (Fauna)
Seed or Spore Dispersal Biotic (Fauna)

Plant Care and Propagation

Light Preference Full Sun
Water Preference Moderate Water
Plant Growth Rate Fast
Maintenance Requirements Low
Potential Problems It produces copious amounts of seeds that can quickly overtake a garden.
Propagation Method Seed

Foliar

Foliage Retention Evergreen
Mature Foliage Colour(s) Green
Mature Foliage Texture(s) Hairy / Hirsute
Prominent Young Flush Colour(s) Green
Foliar Type Compound (Odd-Pinnate)
Foliar Attachment to Stem Petiolate
Foliar Shape(s) Non-Palm Foliage (Oval)
Foliar Venation Pinnate / Net
Foliar Margin Serrate / Toothed
Foliar Apex - Tip Acute

Floral (Angiosperm)

Flower Colour(s) Yellow / Golden, White
Flower Grouping Cluster / Inflorescence
Flower Location Terminal
Flower Symmetry Radial
Individual Flower Shape Stellate / Star-shaped
Inflorescence Type Compound Head / Capitulum
Flowering Period Free-Flowering
Flower Texture(s) Remarks Pleated
Flower Size 2.5 cm

Image Repository

Images

Others

Master ID 29307
Species ID 3616
Flora Disclaimer The information in this website has been compiled from reliable sources, such as reference works on medicinal plants. It is not a substitute for medical advice or treatment and NParks does not purport to provide any medical advice. Readers should always consult his/her physician before using or consuming a plant for medicinal purposes.
Species record last updated on: 23 February 2022.

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