Bidens L.
Details
Nomenclature
L.
L.
1753
ICN
Bidens L.
genus
Bidens
Classification
Subordinates
Vernacular names
Associations
Descriptions
Bidens L.
Capitula solitary, or infl. compound. Phyll. in 2 series. outer foliaceous, inner membr.; receptacle ± flat, with chaffy deciduous scales. Ray-florets ligulate, neuter, or absent; disk-florets tubular, perfect. Achenes us. 4-angled, pappus of 2 to 4 barbed bristles. Annual to perennial herbs with opp. lvs. A widespread genus of some 200 spp., mainly of America.
Bidens L.
Annual or perennial herbs. Lvs opposite, simple and entire to pinnately or ternately dissected or compound. Capitula pedunculate, solitary or in loose cymes. Involucral bracts in 2 rows; outer row usually foliaceous; inner row membranous. Receptacle flat or slightly convex; scales present. Either outer florets ligulate, female or sterile, and white, yellow or pink, or all florets tubular and ☿. Achenes all similar, square or flattened in section but not winged; pappus of (0)-2-5 awns usually with retrorse barbs.
Taxonomic concepts
Collections
Metadata
e35bb4d1-4753-4271-92b7-a75c6d1a3d41
scientific name
Names_Plants
1 January 2000
27 April 2006