Vascular Plants of North Carolina
Account for Strawstem Beggarticks - Bidens comosa   (A. Gray) Wiegand
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Author(A. Gray) Wiegand
DistributionMostly in the Mountains and northern Piedmont; scarce in southern Piedmont.

Newf. to B.C., south to GA, TX, and CA.
AbundanceGenerally uncommon in the Mountains and the northern half of the Piedmont; rare in the southern Piedmont and in much of the foothills. As the taxonomy of this species is somewhat uncertain, it may be that the species is under-collected or simply is overlooked. The website editors have assigned a State Rank of S3, as this species is not in the NCNHP database.
HabitatMarshes, seepage bogs, wet meadows, ditches, clearings, and other disturbed (but usually damp) soil.
PhenologyFlowering and fruiting August-October.
IdentificationSeveral of our beggarticks lack ray florets and can be difficult to tell apart without a good key. The website editors recommend Weakley (2018). Leaves of Strawstem Beggarticks are narrowly ovate or elliptical, simple (rarely with a pair of basal lobes), and toothed. Heads are produced singly at tips of stalks and have several leaflike bracts in a circle at the base of the head. As the ray flowers/florets are absent or scarce, the flowers will normally consist of just the yellow disk florets only.
Taxonomic CommentsSome authors lump it within the cosmopolitan species B. tripartita, which usually has 3-lobed leaves. A synonym is B. connata, which Weakley (2020) elevates to species status; we remain skeptical.

Other Common Name(s)Threelobe Beggarticks, Three-part Beggarticks, Leafy-bracted Beggarticks, Swamp Beggarticks. Despite the most prevalent common name, most leaves are simple and with no lobes.
State Rank[S3]
Global RankG5T5 [G5]
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