Bidens
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 Bidens laevis
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Bidens is a genus with about 200 species in the family Asteraceae. The species Bidens laevis, also known as "beggar tick," is a common fall flower in the southeastern USA. Bidens frondosa is considered to be a weed in New Zealand, although it is not officially declared as such.
Bidens species are used as food plants by the larvae of some Lepidoptera species including Hypercompe hambletoni.
The name Bidens comes from the latin for "two-toothed" which reffers to the bristles on the achenes
The common names "beggar's tick" and "stickseed" relates to the burr seeds of this genus, most of which are barbed and will stick to clothing, fur, or feathers.
[edit] Species
- Bidens alba (Linnaeus) A. P. Candolle
- Bidens alba (L.) DC. -- Romerillo
- Bidens amplectens Sherff -- Kokolau
- Bidens amplissima Greene -- Vancouver Island Beggarticks
- Bidens aristosa (Michx.) Britt. -- Bearded Beggarticks, Bearded Beggerticks, Long-bracted Beggar-ticks, Tickseed Sunflower
- Bidens asymmetrica (Levl.) Sherff -- Koolau Range Beggarticks
- Bidens aurea (Ait.) Sherff -- Arizona Beggarticks
- Bidens bidentoides (Nutt.) Britt. -- Delmarva Beggarticks
- Bidens bigelovii Gray -- Bigelow Beggarticks, Bigelow's Beggarticks, Stickseed
- Bidens bipinnata L. -- Spanish Needles, Spanish-needles
- Bidens campylotheca Schultz-Bip. -- Viper Beggarticks
- Bidens cernua L. -- Bur Marigold, Nodding Beggartick, Nodding Beggarticks, Nodding Bur Marigold, Nodding Burmarigold, Nodding Burr-marigold, Sticktight
- Bidens cervicata Sherff -- Kauai Beggarticks
- Bidens conjuncta Sherff -- Bog Beggarticks
- Bidens connata Muhl. ex Willd. -- Purple-stem Beggarticks, Purplestem Beggartick
- Bidens coronata (L.) Britt. -- Crowned Beggarticks
- Bidens cosmoides (Gray) Sherff -- Cosmosflower Beggarticks
- Bidens cuneata Sherff -- Cuneate Bidens, Wedge Beggarticks
- Bidens cynapiifolia Kunth -- West Indian Beggarticks
- Bidens discoidea (Torr. & Gray) Britt. -- Discord Beggarticks, Small Beggarticks, Swamp Beggar-ticks
- Bidens eatonii Fern. -- Bident d'Eaton, Eaton's Beggar-ticks, Eaton's Beggarticks
- Bidens ferulifolia (Jacq.) DC. -- Apache Beggarticks
- Bidens forbesii Sherff -- Coastalbluff Beggarticks
- Bidens frondosa L. -- Bur Marigold, Devil's Beggartick, Devil's Beggarticks, Devil's Bootjack, Devil's-pitchfork, Devils Beggartick, Pitchfork Weed, Sticktight, Sticktights, Tickseed Sunflower
- Bidens gardneri Baker -- Ridge Beggartick
- Bidens hawaiensis Gray -- Hawai'i Beggarticks
- Bidens heterodoxa (Fern.) Fern. & St. John -- bident différent, Connecticut Beggar-ticks, Connecticut Beggarticks
- Bidens heterosperma Gray -- Rocky Mountain Beggarticks
- Bidens hillebrandiana (Drake) O. Deg. -- Seacliff Beggarticks
- Bidens hyperborea Greene -- Estuary Beggarticks
- Bidens laevis (L.) B.S.P. -- Burmarigold, Smooth Beggartick, Smooth Beggarticks
- Bidens lemmonii Gray -- Lemmon's Beggarticks
- Bidens leptocephala Sherff -- Few-flower Beggarticks, Fewflower Beggarticks
- Bidens macrocarpa (Gray) Sherff -- Largefruit Beggarticks
- Bidens mauiensis (Gray) Sherff -- Maui Beggarticks
- Bidens menziesii (Gray) Sherff -- Mauna Loa Beggarticks
- Bidens micrantha Gaud. -- Grassland Beggarticks
- Bidens mitis (Michx.) Sherff -- Smallfruit Beggarticks
- Bidens molokaiensis (Hbd.) Sherff -- Molokai Beggarticks
- Bidens X multiceps Fassett -- Beggartick
- Bidens pilosa L. -- Beggar's Tick, Cobbler's Pegs, Fisi'uli, Hairy Beggarticks, Kofe tonga, Matakaro, Spanish Needle, Spanish Needles
- Bidens populifolia Sherff -- Oahu Beggarticks
- Bidens reptans (L.) G. Don -- ManzanillaTtrepador
- Bidens sandvicensis Less. -- Shrubland Beggarticks
- Bidens squarrosa Kunth
- Bidens tenuisecta Gray -- Slim-lobe Beggarticks, Slimlobe Beggarticks
- Bidens torta Sherff -- Corkscrew Beggarticks
- Bidens tripartita L. -- Three-lobe Beggarticks, Threelobe Beggarticks
- Bidens triplinervia
- Bidens triplinervia var. macrantha
- Bidens valida Sherff -- Mt. Kahili Beggarticks
- Bidens vulgata Greene -- Big Devils beggartick, Tall Beggarticks, Western sticktight
- Bidens wiebkei Sherff -- Ko`oko`olau, Wiebke's Beggarticksda:Brøndsel
de:Zweizähne lt:Lakišius nl:Tandzaad ja:センダングサ pt:Bidens sv:Skäror
