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Common Names in English:
Discord Beggarticks, Small Beggarticks, Swamp Beggar-Ticks
Common Names in French:
The largest family of flowering plants , the Compositae (Asteraceae), comprising about 1,100 genera and more than 20,000 species and characterized by many small flowers arranged in a head looking like a single flower and subtended by an involucre of bracts. A head may consist of both ray flowers and disk flowers, as in the sunflower, of disk flowers only, as in the burdock, or of ray flowers only, as in the dandelion.
The Heliantheae are a tribe of closely related genera of the sunflower family that can be readily recognized due to the association of a receptacular bract or chaff scale with each disk floret in the head . The heads usually include bisexual , actinomorphic disk florets with tubular corollas that have 4 or 5 distal lobes and also peripheral zygomorphic female or sometimes sterile florets with strap-shaped corollas that have 3 or fewer distal teeth. However, the ray flowers are sometimes absent and the heads are then discoid , containing only bisexual florets with tubular corollas. The pappus is absent or more commonly ranges from scales to stiff bristles . -- Gerald Carr.
or perennials [shrubs
], 5400 cm. Stems usually 1, usually erect
or 4-angled, often striate
) branched distally or ± throughout. Leaves usually cauline; usually opposite, rarely whorled
, distal sometimes alternate; petiolate
or sessile; blades
), or 13+-pinnatisect or -pinnately lobed
(submerged leaves multifid
. beckii, an aquatic
, serrate, or toothed
, sometimes hirtellous, hispidulous
, pilosulous, puberulent
, scabrellous, or strigillose
. Heads usually radiate
, sometimes ± disciform
, usually in corymbiform
arrays, sometimes in 2s or 3s or borne singly. Calyculi of (3) 513(21+) erect to spreading
, ± herbaceous (sometimes foliaceous
or bracts (sometimes surpassing
phyllaries). Involucres mostly hemispheric
, (1) 412(25+) mm diam. Phyllaries persistent
, mostly (4) 821(30+) in ± 2 series, usually distinct
, sometimes connate
0.050.1 their lengths
, mostly oblong
to lance-oblong, chartaceous
to membranous or scarious
(usually striate with brownish nerves
, margins usually hyaline
). Receptacles flat or slightly convex
, paleate; paleae usually falling, (usually stramineous
, sometimes yellow to orange, with darker striae) ± flat to slightly navicular
. Ray florets usually 121+ (often 3, 5, 8, or 13), sometimes 0, usually neuter
, sometimes styliferous and sterile
; corollas usually yellow, sometimes white or pinkish. Disc florets (5) 1260(150+), bisexual
; corollas usually yellow to orange, sometimes whitish [purplish], tubes
shorter than throats
(3) 5, ± deltate (staminal
glabrous; style-branch appendages
deltate or lanceolate to subulate
). Cypselae usually obcompressed
to flat, unequally 34-angled, and cuneate to oblanceolate
, sometimes (all or inner) ± equally 4-angled and linear-fusiform, rarely subterete, margins (± corky-winged in B. aristosa, B. cernua, and B. polylepis) usually retrorsely, sometimes patently or antrorsely, barbed
, apices sometimes attenuate, not beaked
[beaked], faces smooth
, striate, or ± tuberculate
, glabrous or hairy
, each sometimes with 2 grooves
; pappi 0, or persistent, of (1) 24(8) usually retrorsely, sometimes antrorsely, barbellate
or ciliate, rarely smooth, awns
. x = 13.
Species 150-250+: widespread, especially in subtropical , tropical , and warm-temperate North America and South America.
Within species of Bidens, leaves may be simple, 1-pinnately compound, or 1-3-pinnatisect or -pinnately or -ternately lobed. For compound leaves, leaflets are described; for leaves mostly 1-pinnately lobed, primary lobes are described; for leaves 2-3-pinnatisect or -pinnately lobed, the ultimate lobes are described. Involucres in Bidens species are subtended by more or less herbaceous (sometimes foliaceous) bractlets or bracts; collectively, they constitute calyculi and they often well surpass the phyllaries. Together, phyllaries constitute involucres. In keys and descriptions here, shapes , heights , and diameters given for involucres are for involucres at flowering; involucres are sometimes notably larger in fruit. In some Bidens species, the outer and inner cypselae are obcompressed (unequally 3-4-angled) to flat, are mostly cuneate to obovate or nearly linear (broadest at or near apices), and are more or less similar except for sizes (outer smaller) ; in other species, the outer cypselae are obcompressed to flat and obovate to cuneate or linear and the inner are more or less equally 4-angled (in cross section ) and linear-fusiform (thickest near their middles and more or less attenuate toward their tips ).
Species Bidens discoidea
, (10-) 20-60(-180) cm. Leaves: petioles
deltate to lance-ovate overall, 30-80(-100+) × 10-30(-80+)
mm, usually 3-foliolate, leaflets
, lance-ovate to lanceolate,
(10-) 20-50(-100) × 5-20(-40) mm, bases
usually serrate, sometimes ciliate
, apices acuminate to attenuate,
or hirtellous. Heads usually borne singly,
sometimes in 2s or 3s. Peduncles 10-20(-50+) mm.
of (3-) 4(-5+) ± appressed
, seldom foliaceous
or bracts (3-) 12-25 mm, margins seldom ciliate, abaxial
faces usually glabrous. Involucres ± hemispheric
× 4-6(-9) mm. Phyllaries 5-7, oblong
4-6+ mm. Ray florets 0. Disc florets (10-) 15-20+;
corollas ± orange, 1.5-2 mm. Cypselae blackish to red-brown
, ± flattened, linear to narrowly cuneate, outer
3-5 mm, inner 4-6+ mm, margins not distinctly ciliate, apices ±
, faces ± tuberculate
, antrorsely strigillose
pappi of 2 ± erect
, antrorsely barbed
(0.2-) 1-2.4 mm. 2n = 24. [source]
Bidens discoidea is not nearly as variable morphologically as the closely related B . vulgata or B. frondosa. It differs from B. frondosa in having smaller heads , cypselae with shorter, antrorsely barbed awns, fewer phyllaries and flowers per head, sparse indument , and leaves with fewer, more acuminate leaflets. Both B. discoidea and B. frondosa differ from B. vulgata in texture of flowers, in heads, and in shapes and surfaces of cypselae (M. L. Roberts 1982, 1983; M. G. Hickler 1999). [source]
Flowers: Flower Color: Yellow • Flower Conspicuous: Yes
Seeds: Seed per Pound: 13000 • Seed Spread Rate: Rapid • Seedling Vigor: High • Fruit/Seed Abundance: High • Fruit/Seed Color: Brown • Fruit/Seed Conspicuous: No • Cold Stratification Required: No
Foliage: Foliage Color: Green • Foliage Porosity Summer: Moderate • Foliage Porosity Winter: Porous • Foliage Texture: Coarse • Fall Conspicuous: Yes • Leaf Retention: No
Active Growth Period: Spring , Summer, Fall • Growth Rate: Rapid • After Harvest Regrowth Rate: Slow • Mature Height (feet): 5.2 • Vegetative Spread Rate: None • Lifespan: Lifespan
Ponds , swamps , other relatively wet sites; 10-300 m .
Typically found at an altitude of 0 to 678 meters (0 to 2,224 feet).
Duration: Annual • Coppice Potential: No • Progagated by Bulbs: No • Propagated by Bare Root: No • Propagated by Container: No • Propagated by Corms: No • Propagated by Cuttings: No • Propagated by Seed: Yes • Propagated by Sod: No • Propagated by Sprigs: No • Propagated by Tubers: No • Fruit/Seed Period Begin: Fall • Fruit/Seed Period End: Fall • Fruit/Seed Persistence: Yes
Soil: Adapted to Medium Textured: Adapted to Medium Textured Soils • Adapted to Coarse Textured Soils: Yes • Anaerobic Tolerance: Medium • Salinity Tolerance: None • CaCO3 Tolerance: Medium • Minimum pH: 5.1 • Maximum pH: 7.1 • Fertility Requirement: Medium
Sunlight: Shade Tolerance: Intermediate
Moisture: Drought Tolerance: Low • Minimum Precipitation: 32 • Maximum Precipitation: 55 • Moisture Use: High
Temperature: Minimum Temperature (F): 52 • Minimum Frost Free Days: 130
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Brongniart, 1843
- Takhtajan, 1967
- Takhtajan Ex Reveal, 1992
- Lindley, 1833
- Giseke, 1792, nom. cons., nom. alt.
- Tribe: Heliantheae ()
- Subfamily: Asteroideae ()
- Family: Compositae () - Giseke, 1792, nom. cons., nom. alt.
- Order: Asterales () - Lindley, 1833
- Superorder: Campanulanae () - Takhtajan Ex Reveal, 1992
- Subclass: Asteridae () - Takhtajan, 1967
- Class: Spermatopsida () - Brongniart, 1843
- Subphylum: Euphyllophytina ()
- Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Coreopsis discoidea Torrey & A. Gray
Status: Accepted Name
Comment: Data Providers: Govaerts World Compositae Checklist A-G, IPNI, Tropicos, Euro+Med. GCC LSID: urn :lsid:compositae.org:names:97D5DE97-15FA-4659-A7AC-A3E9C6EAB38B
Last scrutiny: 15-Oct-09
Members of the genus Bidens
ZipcodeZoo has pages for 90 species, subspecies, varieties, forms, and cultivars in this genus:
B. alba (Romerillo) · B. alba var. radiata (Bidens) · B. alba var. radiata (Sch.Bip.) Ballard ex T.E.Melchert (Bidens) · B. amplectens (Koko'olau) · B. amplissima (Vancouver Island Beggar-Ticks) · B. aristosa (Bearded Beggarticks) · B. asymmetrica (Asymmetrical Beggar-Ticks) · B. aurea (Arizona Beggar-Ticks) · B. bidentoides (Delmarva Beggarticks) · B. bigelovii (Bigelow Beggarticks) · B. bipinnata (Spanish Needles) · B. campylotheca (Campylotheca Bidens) · B. campylotheca campylotheca (Koko`olau) · B. campylotheca pentamera (Viper Beggarticks) · B. campylotheca waihoiensis (Koko`olau) · B. campylotheca subsp. pentamera (Viper Beggarticks) · B. campylotheca subsp. waihoiensis (Waihoi Beggarticks) · B. cernua (Bur Marigold) · B. cernua var. Cernua (Bur Marigold) · B. cervicata (Kauai Beggarticks) · B. conjuncta (Bog Beggarticks) · B. connata (Purple-Stem Beggarticks) · B. coronata (Crowned Beggarticks) · B. cosmoides (Cosmos-Flower Beggar-Ticks) · B. cuneata (Cuneate Bidens) · B. cynapiifolia (West Indian Beggar-Ticks) · B. discoidea (Discord Beggarticks) · B. eatoni (Eaton's Beggar-Ticks) · B. eatonii (Eaton's Beggar-Ticks) · B. ferulifolia 'Goldie' (Apache Beggarticks) · B. ferulifolia 'Gold Marie' (Apache Beggarticks) · B. ferulifolia 'Klebf07003' (Fern-Leaved Beggar-Ticks 'klebf07003') · B. ferulifolia 'Klebf07570' (Fern-Leaved Beggar-Ticks 'klebf07570') · B. ferulifolia 'Peter's Gold Carpet' (Bur Marigold) · B. ferulifolia 'Smiley' (Apache Beggarticks) · B. ferulifolia 'Solaire Yellow' (Apache Beggarticks) · B. forbesii (Coastalbluff Beggarticks) · B. forbesii kahiliensis (Apache Beggar-Ticks) · B. forbesii subsp. kahiliensis (Kahili Beggarticks) · B. frondosa (Beggar Ticks) · B. gardneri (Ridge Beggartick) · B. hawaiensis (Hawai'i Beggarticks) · B. heterodoxa (Connecticut Beggar-Ticks) · B. heterodoxa var. heterodoxa (Connecticut Beggarticks) · B. heterosperma (Rocky Mountain Beggarticks) · B. hillebrandiana polycephala (Hillebrand's Beggar-Ticks) · B. hillebrandiana subsp. polycephala (Seacliff Beggarticks) · B. hyperborea (Estuary Beggar-Ticks) · B. hyperborea Greene var. gaspensis Fern. (Estuary Beggarticks) · B. hyperborea Greene var. hyperborea Greene (Estuary Beggarticks) · B. hyperborea Greene var. svensonii Fassett (Svenson's Beggarticks) · B. hyperborea var. arcuans (Estuary Beggarticks) · B. hyperborea var. gaspensis (Estuary Beggarticks) · B. hyperborea var. hyperborea (Estuary Beggarticks) · B. hyperborea var. svensonii (Svenson's Beggarticks) · B. laevis (Burmarigold) · B. lemmonii (Lemmon's Beggar-Ticks) · B. leptocephala (Few-Flower Beggar-Ticks) · B. macrocarpa (Large-Fruit Beggar-Ticks) · B. mauiensis (Maui Beggarticks) · B. menziesii filiformis (Mauna Loa Beggarticks) · B. menziesii subsp. filiformis (Mauna Loa Beggarticks) · B. micrantha ctenophylla (Grassland Beggarticks) · B. micrantha kalealaha (Grassland Beggarticks) · B. micrantha micrantha (Grassland Beggarticks) · B. micrantha subsp. ctenophylla (Grassland Beggarticks) · B. micrantha subsp. kalealaha (Kalealaha Beggarticks) · B. mitis (Florida Marigold) · B. molokaiensis (Molokai Beggar-Ticks) · B. multiceps (Beggartick) · B. pilosa (Beggar's Tick) · B. pilosa var. radiata (Beggar's Tick) · B. polycephala (Seacliff Beggarticks) · B. populifolia (Oahu Beggarticks) · B. reptans (Manzanilla Trepador) · B. reptans var. reptans (Manzanilla Trepador) · B. reptans var. urbanii (Urban's Beggartick) · B. sandvicensis confusa (Hawaiian Islands Beggar-Ticks) · B. sandvicensis sandvicensis (Shrubland Beggarticks) · B. sandvicensis subsp. confusa (Shrubland Beggarticks) · B. sulphurea (Sulphur Cosmos) · B. tenuisecta (Slim-Lobe Beggar-Ticks) · B. torta (Cork-Screw Beggar-Ticks) · B. tripartita (Three-Lobe Beggar-Ticks) · B. valida (Robust Bidens) · B. vulgata (Big Devils Beggartick) · B. wiebkei (Wiebke's Beggarticks) · B. amplissima (Hong Kong Orchid Tree) · B. x multiceps (Beggartick) · B. amplissima (Ottawa Barberry)
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- A guide and key to the aquatic plants of the Southeastern United States, by Don E. Eyles and Lynne Robertson, Jr. With original drawings by Garnet W. Jex. Washington, U. S. Govt. Print. Off., 1963. url p. 140.
- A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations, Cedar Rapids, Ia., The Torch Press, 1911. url .
- A manual of poisonous plants: chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations / by L.H. Pammel. Cedar Rapids, Iowa: Torch Press, 1910-1911. url p. 780.
- A survey of natural areas in Brunswick County, North Carolina: for The North Carolina Natural Heritage Program, Coastal Natural Area Inventory Project / Raleigh: North Carolina Coastal Energy Impact Program, Office of Coastal Management, North Carolina Dept. of Natural Resources and Community Development, [1982?] url .
- An illustrated flora of the northern United States, Canada and the British possessions: from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian / by Nathaniel Lord Britton and Hon. Addison Brown. New York: Scribner, 1913. url p. 494, p. 497.
- An illustrated guide to the flowering plants of the middle Atlantic and New England states (excepting the grasses and sedges) the descriptive text written in familiar language, by George T. Stevens. .. with more than 1800 illustrations from drawings by the author. New York, Dodd, Mead and company, 1910. url p. 684, p. 685.
- Annotated list of the ferns and flowering plants of New York state, by Homer D. House. Albany, The University of the state of New York, 1924. url p. 729.
- Annual report of the Michigan Academy of Science. Lansing, Mich.: The Academy, 1904. url p. 133.
- Annual report of the Ohio State Academy of Science. Columbus: The Academy, 1893-1930. url p. 130, p. 31, p. 46, p. 70, p. 99.
- Annual report of the Regents / Albany: J.B. Lyon, State Printer, 1890-1903. url p. 633.
- Annual report of the Secretary of the Connecticut Board of Agriculture. Hartford: The Board, 1867-1925. url p. 53.
- Aquatic and wetland plants of southwestern United States, by Donovan S. Correll and Helen B. Correll. [Washington]Environmental Protection Agency; [For sale by the Supt. of Docs., U.S. Govt. Print. Off.]1972. url p. 1668, p. 1670.
- Atlas of the rare vascular plants of Ontario / Ottawa: Botany Division, National Museum of Natural Sciences = Division de la botanique, Musée national des sciences naturelles, 1982-1987. url .
- Bartonia;proceedings of the Philadelphia botanical club. .. 1 - 10 1908 - 19 Philadelphia, Philadelphia Botanical Club, Academy of Natural Sciences. url p. 19.
- Bulletin - New York State Museum. Albany: New York State Education Dept. url p. 13.
- Bulletin / Ohio Biological Survey. Columbus, Ohio: Ohio State University, 1913- url p. 228.
- Bulletin of the Torrey Botanical Club. 26 1899 New York: Torrey Botanical Club, 1870-1996 url p. 401, p. 403, p. 406, p. 407.
- Catalog of Ohio vascular plants, arranged according to the phyletic classification; with notes on the geographical distribution in the state, based mainly on specimens in the State Herbarium, Botanical Laboratory, the Ohio State Univ Columbus, The Ohio State University, 1914. url .
- Catalogue of the flowering plants and ferns of Connecticut growing without cultivation / by Charles Burr Graves. .. [et al.]; Committee of the Connecticut Botanical Society. Hartford: Printed for the State Geological and Natural History Survey, 1910. url p. 396.
- Checklist of plants of the Ottawa District. Ottawa, 1958. url p. 85.
- Compositae newsletter. Columbus, Ohio: Dept. of Botany, Ohio State University, 1975- url p. 34.
- Contributions from the Botanical Laboratory. Philadelphia: University of Pennsylvania Press, 1892- url , .
- Contributions from the United States National Herbarium 21 1919 Washington, D.C.: Smithsonian Institution Press, 1890- url p. 289, p. 808.
- Erigenia: journal of the Illinois Native Plant Society. Carbondale, Ill.: The Society, 1982- url p. 19.
- Flood tolerance of plant species in bottomland forests of the southeastern United States / 1992. url p. 128, p. 164, p. 194.
- Flora of Delaware and the Eastern Shore: an annotated list of the ferns and flowering plants of the peninsula of Delaware, Maryland and Virginia. [Wilmington]: Society of Natural History of Delaware, 1946. url p. 272.
- Flora of Indiana, by Charles C. Deam. Indianapolis, Wm. B. Burford printing co., contractor for state printing and binding, 1940. url p. 982, p. 983, p. 984.
- Flora of Pennsylvania, Boston, Ginn & Company, 1903. url , .
- Flora of Pennsylvania. Edited with the addition of analytical keys by John Kunkel Small. Boston, Ginn & Co., 1903. url p. 334, p. 335.
- Flora of Vermont. List of ferns and seed plants growing without cultivation. Prepared by Vermont Botanical Club. Burlington, Vt., Free Press Print. Co., 1915. url p. 252.
- Flora of the District of Columbia and vicinity. By A.S. Hitchcock and Paul C. Standley, with the assistance of the botanists of Washington. WashingtonGovt. print. off.1919 url p. 288, p. 289.
- Flora of the Indiana dunes, a handbook of the flowering plants and ferns of the lake Michigan Coast of Indiana and of the Calumet District, by Donald Culross Peattie. Chicago, Field Museum of Natural History, 1930. url p. 389.
- Flora of the southeastern United States; being descriptions of the seed-plants, ferns and fern-allies growing naturally in North Carolina, South Carolina, Georgia, Florida, Tennessee, Alabama, Mississippi, Arkansas, Louisiana, and in Oklahom by John Kunkel Small. New York, The author, 1913. url p. 1279, p. 1281, p. 1281.
- Gray's new manual of botany (7th ed.--illustrated) A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada, Cincinnati [etc.]American book company[c1908] url p. 839.
- Gray's new manual of botany, a handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada, rearranged and extensively revised by Benjamin Lincoln Robinson. .. and Merritt Lyndon Fernald. .. New York, Cincinnati [etc.]American Book Co.[c1908] url p. 839.
- Handbook of the flora of Philadelphia and vicinity, containing data relating to the plants within the following radius: eastern Pennsylvania, north to the Blue mountains, and west to the Susquehanna; all of New Jersey except the northern counties; and Philadelphia, Philadelphia Botanical Club, 1905. url , .
- Illinois River Bluffs area assessment / Illinois Department of Natural Resources, Office of Scientific Research and Analysis, [and the] State Geological Survey Division. Springfield, Ill.: Illinois Dept. of Natural Resources, 1998- url p. 170, p. 176.
- List of Pteridophyta and Spermatophyta growing without cultivation in northeastern North America. Prepared by a Committee of the Botanical Club, American Association for the Advancement of Science. New York, 1894. url p. 337.
- Manual of the flora of the northern states and Canada / by Nathaniel Lord Britton. New York: Holt, 1905. url p. 1000, p. 1002.
- Memoirs of the Torrey Botanical Club. 5 1893 - 18 Durham, N.C.: Published for the Club by the Seeman Printery, 1889- url p. 337.
- Michigan flora: a list of the fern and seed plants growing without cultivation / prepared by W.J. Beal. [Lansing, Mich.]: State Board of Agriculture: 1904. url , p. 133.
- Natural areas inventory, Gates County, North Carolina / Raleigh: North Carolina Coastal Energy Impact Program, Office of Coastal Management, North Carolina Dept. of Natural Resources and Community Development,  url p. 150.
- New manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada, rearr. and extensively rev. by Benjamin Lincoln Robinson and Merritt Lyndon Fernald. New YorkAmerican Book Co.[c1908] url p. 839.
- Phytologia memoirs. Plainfield, N.J.: H.N. Moldenke and A.L. Moldenke, 1980- url p. 555.
- Phytologia. Bronx Park, New York, H.A. Gleason and H.N. Moldenke, url p. 430.
- Plant life of Alabama, an account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state. By Charles Mohr. .. Montgomery, Ala., Brown printing co., 1901. url p. 808.
- Plant life of Alabama. An account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state. Prepared in cooperationwith the Washington, Govt. Print. Off., 1901. url .
- Plant life of Alabama: an account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state / by Charles Mohr. Montgomery, Ala.: Brown Printing Co., 1901. url p. 808.
- Proceedings of the Biological Society of Washington. Washington, Biological Society of Washington url p. 85, p. 85.
- Proceedings of the Indiana Academy of Science. Indianapolis, Ind.[s.n.] url p. 369, p. 369.
- Proceedings of the Rochester Academy of Science. Rochester, N.Y.: The Academy.1889- url p. 77.
- Report of the Geological Survey of Ohio. Columbus, Nevins & Myers, state printers, 1873-93. url .
- Report of the Michigan Academy of Science. Lansing, Mich.: The Academy, 1904-1916. url p. 197.
- Report of the State Botanist. Albany, N.Y.: University of the State of New York, 1898-1925. url p. 13.
- Revision of the genus Coreopsis, by Earl Edward Sherff. 11 1936 Chicago, 1936. url p. 453.
- Small, J. K. Flora of the southeastern United States;being descriptions of the seed-plants, ferns and fern-allies growing naturally in North Carolina, South Carolin, Georgia, Florida, Tennessee, Alabama, Mississippi, Arkansas, Louisiana and the Indian territory and in Oklahoma and Texas east of the one-hundredth meridian /by John Kunkel Small. .. 1903 New York: The author, 1903. url p. 1279, p. 1281.
- Special papers / Ohio Academy of Sciences. Columbus, Ohio: The Academy, 1899-1929. url p. 130, p. 31, p. 46, p. 70, p. 99.
- Syllogeus. Ottawa, National Museum of Natural Sciences, 1972-1995. url p. 16, p. 18, p. 24, p. 25, p. 74, p. 78.
- The Ohio journal of science. Columbus, Ohio, The Ohio State University and the Ohio Academy of Science url p. 318, p. 418, p. 62.
- The flora of Long Island. Lancaster, Pa.New Era Print., 1899. url .
- The flora of the town of Southold, Long Island, and Gardiner's Island / New York: Torrey Botanical Club, 1914? url p. 253.
- The genus Bidens. .. by Earl Edward Sherff. 16 1937 Chicago, 1937. url p. 233, p. 236, p. 51, p. 6, plate LXI.
- The plants of Michigan; simple keys for the identification of the native seed plants of the state, by Henry Allan Gleason. Ann Arbor, G. Wahr, c1918. url p. 124.
- The weed flora of Iowa / [by L. H. Pammel; with the collaboration of Charlotte M. King. .. et al.] Des Moines: Iowa Geological Survey, 1913. url p. 349, p. 489, p. 575, p. 577, p. 691, p. 720, p. 789.
- The weed flora of Iowa Des Moines, Iowa geological survey, 1913. url , , , , .
- The weed flora of Iowa. .. Des Moines, Iowa Geological Survey, 1913. url p. 349, p. 350, p. 489, p. 575, p. 577, p. 691, p. 789.
- Torreya. Burlington, Vt., Torrey Botanical Club, 1901-1945. url p. 105, p. 149, p. 253, p. 38.
- Transactions of the Academy of Science of St. Louis. 25 1926 [St. Louis: Academy of Science of St. Louis], 1860-1958. url p. 140.
- Transactions of the Kentucky Academy of Science. [Lexington, Ky.]Kentucky Academy of Science, 1923-1997. url p. 103, p. 72, p. 81.
- Vascular plants of the Sangamon River basin; annotated checklist and ecological summary [by] Almut G. Jones and David T. Bell. [Urbana], University of Illinois at Urbana-Champaign, College of Agriculture,  url p. 23.
- Hall, G. W. 1967. A Biosystematic Study of the North American Complex of the Genus Bidens (Compositae). Ph.D. dissertation. Indiana University.
- Sherff, E. E. 1937. The genus Bidens. Publ. Field Mus. Nat. Hist., Bot. Ser. 16.
- Weedon, R. R. 1973. Taxonomy and Distribution of the Genus Bidens (Compositae) in the North-central Plains States. Ph.D. dissertation. University of Kansas.
- "Bidens discoidea". in Flora of North America Vol. 21 Page 207, 211. Published by Oxford University Press. Online at EFloras.org.
- Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
- Brands, S.J. (comp.) 1989-2006. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed April 19, 2007.
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.
- GCC: Global Compositae Checklist. Release date: November 18, 2009
- Global Biodiversity Information Facility. Accessed January 24, 2008. http://www.gbif.org Mediated distribution data from 2 providers.
- Light, Kris. East Tennessee Wildflowers
- Ruggiero M., Gordon D., Bailly N., Kirk P., Nicolson D. (2011). The Catalogue of Life Taxonomic Classification, Edition 2, Part A. In: Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist (Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D., eds). DVD; Species 2000: Reading, UK.
- The International Plant Names Index. Accessed Jan 19, 2007.
Accessed through GBIF Data Portal November 21, 2007:
- Canadian Museum of Nature, Canadian Museum of Nature Herbarium
- USDA PLANTS, USDA PLANTS Database
- University of Alabama Biodiversity and Systematics, Herbarium
- Biodiversity Heritage Library NamebankID: 2657378
- Catalogue of Life Accepted Name Code: Ast-4174
- Global Biodiversity Information Facility Taxonkey: 13748468
- Globally Unique Identifier: urn:lsid:ipni.org:names:32404-2
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 35719
- Natural Heritage Network Species Identifier: PDAST180L0
- U.S.D.A. Plant Symbol: BIDI
- Zipcode Zoo Species Identifier: 25104
- John L. Strother, Ronald R. Weedon "Bidens". in Flora of North America Vol. 21 Page 184, 185, 205, 206. Oxford University Press. Online at EFloras.org. [back]
- "Bidens discoidea". in Flora of North America Vol. 21 Page 207, 211. Oxford University Press. Online at EFloras.org. [back]
- Mean = 153.200 meters (502.625 feet), Standard Deviation = 129.950 based on 353 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]