
1) Asterid dicot genus 2) Delaware political family 3) Genus bidens 4) Vice-presidential family
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https://www.crosswordclues.com/clue/bidens

==Propagation== The plants are zoochorous; their seeds will stick to clothing, fur or feathers, and be carried to new habitat. This has enabled them to colonize a wide range, including many oceanic islands. Some of these species occur only in a very restricted range and several are now threatened with extinction, notably in the Hawaiian Islands. D...
Found on
http://en.wikipedia.org/wiki/Bidens

genus of weedy herbs in the family Asteraceae, consisting of about 230 species, variously known as bur-marigold, sticktights, beggar-ticks, and ... [1 related articles]
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http://www.britannica.com/eb/a-z/b/62

(Bur Marigold) This group consists of hardy perennials and annuals, commonly called Bur Marigolds. These plants belong to the Daisy family, Compositae, and are found wild in southern U.S., Mexico and Guatemala. They grow from 1 to 3 feet high, with a 12 inch or so spread. B. ferulifolia is a perennial that forms clumps of divided, fern-like, green ...
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http://www.encyclo.co.uk/local/10004

Bidens is a cosmopolitan genus of herbs of the family Compositae. Two species are British marsh plants.
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http://www.probertencyclopaedia.com/browse/BB.HTM

[
n] - bur marigolds
Found on
http://www.webdictionary.co.uk/definition.php?query=Bidens
genus Bidens noun bur marigolds
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.