Bidens pilosa
Summary 5
Bidens pilosa is a species of flowering plant in the aster family, Asteraceae. It is native to the Americas but it is known widely as an introduced species of other regions, including Asia and the Pacific Islands. Its many common names include beggar-ticks, cobbler's pegs, and Spanish needle.
Description 6
Annual herb to 1.5 (-2.2) m. Leaves petiolate, (1-)3-foliolate, glabrous or pilose. Terminal leaflet up to 9 × 5 cm, narrowly ovate to ovate-oblong; base cuneate; apex acuminate; margin ciliate, crenate or serrate-crenate; lateral leaflets smaller, asymmetric. Inflorescence laxly corymbose. Capitula up to 1 cm in diameter. Rays 0 (var. pilosa) or creamy-white, 4-7 and up to 1.5 cm, exceeding (var. radiata Sch.Bip.) or not exceeding (var. minor Blume) the phyllaries. Achenes up to 1.6 cm, blackish. Bristles 2-3, retrorsely barbed.
Diagnostic 7
"Herbs, stem quadrangular. Leaves opposite, 12-18 cm, pinnate; lobes to 6 x 3 cm, ovate-lanceolate, apex acute, base truncate, serrate, hairy. Heads to 1 cm across; peduncles to 8 cm, flexuous involucral bracts biseriate, outer ca 3 x 1 mm, linear, spathulate, inner to 5 x 2 mm, ovate, obtuse; rays 2-5, corolla bilobed, yellow; disc many. Achenes ca 2.5 mm, setae 2-4, ca 3 mm long."
Sources and Credits
- (c) Shipher (士緯) Wu (å³), some rights reserved (CC BY-NC-SA), http://www.flickr.com/photos/13940097@N04/3346351331
- (c) harum.koh, some rights reserved (CC BY-SA), uploaded by harum.koh, https://www.flickr.com/photos/harumkoh/22122999324/
- (c) harum.koh, some rights reserved (CC BY-SA), uploaded by harum.koh, https://www.flickr.com/photos/harumkoh/21621807383/
- (c) colinmorita, some rights reserved (CC BY-NC), uploaded by colinmorita
- (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Bidens_pilosa
- (c) Mark Hyde, Bart Wursten and Petra Ballings, some rights reserved (CC BY-NC), http://eol.org/data_objects/30290527
- (c) India Biodiversity Portal, some rights reserved (CC BY), http://eol.org/data_objects/26340291
More Info
- iNat taxon page
- African Plants - a photo guide
- Atlas of Living Australia
- Biodiversity Heritage Library
- BOLD Systems BIN search
- Calflora
- CalPhotos
- Catalogo de Plantas y Líquenes de Colombia
- eFloras.org
- Flora Digital de Portugal
- Flora of North America (beta)
- Global Biodiversity Information Facility (GBIF)
- HOSTS - a Database of the World's Lepidopteran Hostplants
- IPNI (with links to POWO, WFO, and BHL)
- Jepson eFlora
- NatureServe Explorer 2.0
- NBN Atlas
- New Zealand Plant Conservation Network
- SEINet Symbiota portals
- Tropicos
- USDA PLANTS database
- VASCAN by Canadensys
- World Flora Online
- 日本のレッドデータ検索システム
- 植物和名−学名インデックス YList
