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Magnoliopsida
Bidens L.
EOL Text
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.
"Kerala: dukki, Kottayam, Malapuram, Palakkad, Thiruvananthapuram, Tamil Nadu: Coimbatore, Dharmapuri, Dindigul, Madurai, Namakkal, Nilgiri, Salem, Theni, Tiruchchirappalli, Tirunelveli"
Holotype for Bidens ramosissima Sherff
Catalog Number: US 573388
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): W. E. Safford
Year Collected: 1907
Locality: Near Guadalajara., Jalisco, Mexico, North America
- Holotype: Sherff, E. E. 1913. Bot. Gaz. 56: 491.
| License | http://creativecommons.org/licenses/by/3.0/ |
| Rights holder/Author | This image was obtained from the Smithsonian Institution. Unless otherwise noted, this image or its contents may be protected by international copyright laws. |
| Source | http://collections.mnh.si.edu/search/botany/?irn=2126643 |
Triterpenos, flavonóides(20)
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| Rights holder/Author | CPQBA/UNICAMP, IABIN |
| Source | No source database. |
This native plant is a summer annual about 2-5' tall; it is more or less erect and branches occasionally. The stems are green or reddish green, angular, strongly veined, and hairless (or nearly so). The leaves are mostly opposite; their blades are up to 8" long and 4" across, while their petioles are up to 2" long. The leaf blades are double- or triple-pinnate, medium green, and hairless (or nearly so). The segments of the blades are ovate, lanceolate, or oblanceolate with blunt tips and wedge-shaped bottoms; the margins of these segments are irregularly cleft or dentate. Overall, the leaf blades have a fern-like appearance. The upper stems terminate in individual flowerheads on long peduncles. Each flowerhead is about ½" long and ¼" across; it has numerous disk florets in the center and 0-5 ray florets along its upper margin. The disk florets have corollas that are golden yellow and tubular in shape; each corolla has 5 tiny lobes along its upper rim. The yellow ray florets are petal-like; they are about 1/8" long and oval to oblong in shape. Some flowerheads may lack petal-like extensions of the ray florets altogether. The base of the flowerhead is surrounded by green bracts; the linear inner bracts are much longer (about 1/3" in length) than the outer bracts. The blooming period occurs during the late summer or early fall. Each flowerhead is replaced by a seedhead that is globoid in shape and spans about 1" across. The long narrow seeds (achenes) spread outward from the center in all directions. Each mature seed is linear in shape, 4-angled, and dark brown; it has 2-4 short awns at its tip. Each tiny awn has downward-pointed barbs. The root system consists of a branching taproot. This plant spreads by reseeding itself.
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Copyright © 2002-2014 by Dr. John Hilty |
| Source | http://www.illinoiswildflowers.info/weeds/plants/spanish_needles.htm |
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
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
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | BioImages, BioImages - the Virtual Fieldguide (UK) |
| Source | http://www.bioimages.org.uk/html/Bidens.htm |
"
Global Distribution
Pantropical
Indian distribution
State - Kerala, District/s: Palakkad, Kottayam, Idukki, Malappuram, Thiruvananthapuram, Kannur
"
Isotype for Bidens pilosa f. dissecta Sherff
Catalog Number: US 1404000
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): E. T. Heyde & E. Lux
Year Collected: 1893
Locality: Malpais, Santa Rosa, Guatemala, Central America
Elevation (m): 1300 to 1300
- Isotype: Sherff, E. E. 1925. Bot. Gaz. 80: 379.
| License | http://creativecommons.org/licenses/by/3.0/ |
| Rights holder/Author | This image was obtained from the Smithsonian Institution. Unless otherwise noted, this image or its contents may be protected by international copyright laws. |
| Source | http://collections.mnh.si.edu/search/botany/?irn=2076473 |
Canada
Rounded National Status Rank: NNA - Not Applicable
United States
Rounded National Status Rank: NNA - Not Applicable
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | NatureServe |
| Source | http://explorer.natureserve.org/servlet/NatureServe?searchName=Bidens+pilosa |