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| October 2006 at roadside |
October 2006 at roadside |
October 2006 at roadside |
| Family | Asteraceae (alt. Compositae) |
| Scientific name | Bidens pilosa L. |
| Synonyms | Bidens pilosa L. var. pilosa; Bidens adhaerescens Vellozo; Bidens californica de Candolle; Bidens hirsuta Nuttall; Bidens leucantha Willdenow var. pilosa (L.) Grisebach; Bidens pilosa L. forma discoidea Schultz Bipontinus; Bidens pilosa L. subvar. discoidea (Schultz Bipontinus) Pitard; Bidens reflexa Link; Kerneria pilosa (L.) Lowe; Kerneria pilosa (L.) Lowe var. discoidea (Schultz Bipontinus) Lowe; Kerneria tetragona Moench |
| Common name | (Japanese common name) ko-sendan-gusa [small sendan weed [sendan = Melia azedarach]] |
| (English common name) hairy beggar-ticks, Spanish-needles | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) [native] tropical America | |
| Chromosomal number | n=12, 36, 48; 2n=36, 48, 72 |
| Description | Plants 50-120cm tall. Leaves 7-8cm long, 5-6cm wide. Flowers yellow, flowering in September to November. Annual plants. |
| Reference | Bidens pilosa L. |
| Bidens pilosa L. | |
| Bidens pilosa L. var. pilosa | |
| Cropping systems for managing weeds (WIPO Patent WO/2008/051633) | |
| Note | Naturalized plants (firast recorded at Kyoto in 1908). |
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| October 2006 at roadside |
October 2006 at roadside |
October 2006 at roadside |
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| October 2006 at roadside |
October 2006 at roadside |
October 2006 at roadside |
