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Bidens bipinnata L.
Spanish needles

Life   Plantae   Dicotyledoneae   Asteraceae   Bidens

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Bidens bipinnata, Spanish Needles
© Copyright Sheryl Pollock 2011 · 7
Bidens bipinnata, Spanish Needles
Bidens bipinnata, pollen
© Copyright UDEL Pollen 2014 · 1
Bidens bipinnata, pollen

Bidens bipinnata, pollen
© Copyright UDEL Pollen 2014 · 1
Bidens bipinnata, pollen
Bidens bipinnata, leaf and flower and fruit
© Kay Yatskievych, 2003 · 1
Bidens bipinnata, leaf and flower and fruit

Associates · map
FamilyScientific name @ source (records)
Agaricaceae  Phoma @ BPI (1)
Andrenidae  Andrena aliciae @ AMNH_BEE (2)

Pseudopanurgus rugosus @ AMNH_BEE (1)
Elsinoaceae  Sphaceloma bidentis @ BPI (1)
Entylomataceae  Entyloma bidentis @ BPI (1)
Erysiphaceae  Sphaerotheca castagnei @ BPI (1)

Sphaerotheca humuli @ BPI (2)
Halictidae  Lasioglossum pilosum @ AMNH_BEE (1)
Membracidae  Acutalis tartarea @ NCSU (4)

Entylia carinata @ UDCC_TCN (2); NCSU (7)
Miridae  Polymerus testaceipes @ AMNH_ENT (1)

Taylorilygus apicalis @ AMNH_ENT (3)
Mycosphaerellaceae  Cercospora umbrata @ BPI (2)
Pucciniaceae  Uromyces bidenticola @ BPI (2)

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Delaware Wildflowers  •  Scientific names

Bidens bipinnata L. Spanish Needles
(Spanish-needle Tick-seed) Asteraceae — Aster family
Bidens bipinnata
Cape Henlopen State Park
September 2001 Bidens bipinnata Bidens bipinnata Bidens bipinnata
Rehoboth Beach
September 2019

Guide to Bidens of Delaware

Search Google Delaware USDA

Photos copyright David G. Smith

Information from the Delaware Flora Checklist used with author's permission.

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FNA | Family List | FNA Vol. 21 | Asteraceae | Bidens

7. Bidens bipinnata Linnaeus, Sp. Pl. 2: 832. 1753.

Bidens bipinnata var. biternatoides Sherff

Annuals, (15—)30—100(—150+) cm. Leaves: petioles 20—50 mm; blades rounded-deltate to ovate or lanceolate overall, (20—)30—70+ × (20—)30—60+ mm, (1—)2(—3)-pinnatisect, ultimate lobes obovate or lanceolate, 15—45+ × 10—25+ mm, bases truncate to cuneate, ultimate margins entire, sometimes ciliolate, apices rounded to acute or attenuate, faces usually glabrous, sometimes hirtellous. Heads usually borne singly, sometimes in ± corymbiform arrays. Peduncles (10—)20—50(—100) mm. Calyculi of (7—)8(—10) linear bractlets 3—5 mm, ± appressed, margins ciliate, abaxial faces usually glabrous. Involucres ± campanulate, 5—7 × 3—4(—5) mm. Phyllaries 8—12, lanceolate to linear, 4—6 mm. Ray florets 0 or 3—5+; laminae yellowish or whitish, 1—2(—3) mm. Disc florets 10—20(—30+); corollas yellowish to whitish, 2—3 mm. Cypselae red-brown, outer weakly obcompressed, 7—15 mm, inner ± 4-angled, linear to linear-fusiform, 12—18 mm, margins not ciliate, apices ± attenuate, faces 2-grooved, often tuberculate-hispidulous; pappi of (2—)3—4, erect to divergent, retrorsely barbed awns 2—4 mm. 2 n = 24, 72.

Flowering (Jun—)Aug—Sep(—Oct). Fields, forests, disturbed, wettish sites; 10—1800 m; N.B., Ont.; Ala., Ariz., Ark., Conn., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Miss., Mo., Nebr., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Va., W.Va.; South America; Europe; Asia; Pacific Islands.

Bidens bipinnata is probably native in eastern Asia and introduced in South America, Europe, Asia, and Pacific Islands.

Updated: 2024-05-20 19:08:06 gmt
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