Bidens cernua
| Scientific Name: | Bidens cernua |
| Synonym: | |
| Family: | Asteraceae |
| Common Name: | Nodding Bur Marigold |
| Authority: | Linnaeus |
| Etymology: | Bidens is Latin for "two rows of teeth" referring tho the forked awns on the achenes; cernua is Latin for "nodding" referring to the drooping flower heads after flowering. |
| C Value: | 2 |
| Wetness: | OBL |
| # of Species in Genus in Illinois: | 13 |
| Duration: | Annual |
| Reproduction: | Monoecious |
| Flower Type: | Perfect |
| Flower Shape: | |
| Flower # of Parts: | |
| Flower Color: | Yellow |
| Growth Habit: | Forb |
| Leaf Arrangement: | Opposite |
| Leaf Type: | Simple |
| Leaf Shape: | |
| Leaf Shape Term: | |
| Leaf Margin: | Entire |
| Leaf Toothing: | |
| Stem Surface: | |
| Trunk/Bark: | |
| Armature: | |
| Twig Characteristics: | |
| Habitat: | |
| Distribution: | BONAP Distribution Map |
| Status (State): | Not Listed |
| Status (Federal): | Not Listed |
| ID Tips: | This species has connate leaves that are often perfoliate. |
| Gee Whiz: | Also called Beggar's Ticks because the achenes have forked awns that are barbed. |
| Humor: | |
| More Info: | Illinois Wildflowers Search |