Bidens pilosa

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Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Species Distribution Map
Family:ASTERACEAE
Species:Bidens pilosa L.
Common Name:Spanish needles
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Annual
Category:Vascular
USDA Symbol:**
Plant Notes:**
Taxonomic Notes:Bidens pilosa is part of the "pilosa complex" which includes neotropical taxa some of which have expanded their range into the SE US. True Bidens pilosa (in the strict sense) produces three awns on the cypselae and does not produce rays, or if so, they are 3 mm long or shorter. The other species in our flora is Bidens alba, which typically has substantial white rays (1 cm or more long) and two awns on the cypselae. Some specimens have been observed to have the rays and with third reduced awn on the fruit. This may indicate some introgression among both of the non-native taxa. Several specimens here and under B. alba need to be reevaluated and assigned to the correct taxon accordingly.--B. Keener
Status:Not Native
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyASTERACEAE - Aster family
Genus Bidens
Species Bidens pilosa L. - Spanish needles

Citation

Citation Bidens pilosa Linnaeus, Sp. Pl. 2: 832. 1753.
Basionym: **
Type: Without data (lectotype: LINN 975.8). Lectotypified by D'Arcy, in Woodson & Schery, Ann. Missouri Bot. Gard. 62: 1178. 1975.

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Bidens adhaerescens Bidens adhaerescens Vellozo, Fl. Flumin. 348. 1829 ("1825"). BRAZIL:
Bidens californica Bidens californica de Candolle, Prodr. 5: 599. 1836. CALIFORNIA: Without data, Douglas 56 (holotype: G-DC; isotype: G).
Bidens hirsuta Bidens hirsuta Nuttall, Trans. Amer. Philos. Soc., ser. 2. 7: 369. 1841, non Swartz 1788.  
Bidens leucantha var. pilosa Bidens leucantha Willdenow, var. pilosa (Linnaeus) Grisebach, Cat. Pl. Cub. 155. 1866.Bidens pilosa Linnaeus 1753. 
Bidens pilosa forma discoidea Bidens pilosa Linnaeus, forma discoidea Schultz Bipontinus, in Webb & Berthelot, Hist. Nat. Iles Canaries 3(2(2)): 242. 1844, nom. inadmiss.Bidens pilosa Linnaeus 1753. 
Bidens pilosa subvar. discoidea Bidens pilosa Linnaeus, subvar. discoidea (Schultz Bipontinus) Pitard, in Pitard & Proust, Iles Canaries 226. 1909, nom. inadmiss.Bidens leucantha Willdenow, forma discoidea Schultz Bipontinus 1844; Bidens pilosa Linnaeus, forma discoidea Schultz Bipontinus 1844, nom. inadmiss.; Bidens pilosa Linnaeus 1753. 
Bidens reflexa Bidens reflexa Link, Enum. Pl. Hort. Berol. Alt. 2: 306. 1822. MEXICO: Cult. in Berlin,

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Baldwin, Butler, Coffee, Conecuh, Covington, Crenshaw, Dale, Dallas, Geneva, Henry, Houston, Jefferson, Lee, Mobile, Montgomery, Pike

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: AMAL, AUA, BRIT, SAMF, TROY, UNA, USAM, UWAL

Range of years during which specimens were collected: -

Barcode / Accession No.
County
Coll. Date
Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
BRIT90184 Baldwin 01 Jun 1972 Kral, Robert
47048		 BRIT
Bidens pilosa L.
AUA000001833 Baldwin 1 Jun 1972 KRAL, ROBERT
47048		 AUA
BIDENS PILOSA L.
USAM000001888 Baldwin 15 Jun 1974 LeLong, Michel G.
7831		 USAM
Bidens pilosa Linnaeus
BRIT90198 Baldwin 15 Jun 1974 Lelong, Michel G.
7831		 BRIT
Bidens pilosa L.
UWAL0038021 Baldwin 15 Jun 1974 LeLong, Michel G.
7831		 UWAL
Bidens pilosa Linnaeus
TROY000001545 Baldwin 26 Dec 2005 Diamond, Alvin R.
16017		 TROY
Bidens pilosa Linnaeus
AUA000001763 Baldwin 26 Dec 2005 DIAMOND, JR., ALVIN R.
16107		 AUA
BIDENS PILOSA L.
AUA000026976 Baldwin 3 Oct 2007 BARGER, T.WAYNE
PERD-158		 AUA
BIDENS PILOSA L.
TROY000039923 Baldwin 13 Oct 2007 Keener, Brian R.
3948		 TROY
Bidens pilosa Linnaeus
UWAL0010257 Baldwin 13 Oct 2007 Keener, Brian R.
3948		 UWAL
Bidens pilosa L.
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