| Section 6 » Family Asteraceae |
Show/Hide Synonym
| taxonName | relationship | relatedTaxonName | relatedTaxonRefText | relComments |
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| Bidens comosa | < | Bidens comosa | Gleason and Cronquist (1991) | | | Bidens comosa | < | Bidens comosa | Fernald (1950) | | | Bidens comosa | < | Bidens comosa | Gleason (1952) | | | Bidens comosa | < | Bidens comosa | Small (1933, 1938) | | | Bidens comosa | < | Bidens tripartita | Flora of North America (1993b, 1997, 2000, 2002a, 2002b, 2003a, 2004b, 2005, 2006a, 2006b, 2006c, 2007a, 2009, 2010) | | | Bidens comosa | < | Bidens tripartita | | | | Bidens comosa | < | Bidens tripartita | | | | Bidens comosa | < | Bidens tripartita | | | | Bidens comosa | < | Bidens tripartita | Radford, Ahles, and Bell (1968) | | | Bidens comosa | < | Bidens tripartita | | | | Bidens comosa | = | Bidens tripartita ssp. comosa | | | | Source: Weakley's Flora |
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| Author | (A. Gray) Wiegand | |
| Distribution | Mostly in the Mountains and northern Piedmont; scarce in southern Piedmont.
Newf. to B.C., south to GA, TX, and CA. | |
| Abundance | Seemingly uncommon to perhaps fairly common in the Mountains and the northern half of the Piedmont; rare in the southern Piedmont and in much of the foothills. However, Weakley's (2024) map shows it as "common" in the Mountains and the Piedmont, but "rare" in the Coastal Plain. 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 suggest a State Rank of S3S4, instead of a straight S3, based on Weakley's map. As such, it may well be somewhat more numerous in the state than is the very similar B. connata. | |
| Habitat | Marshes, seepage bogs, wet meadows, ditches, clearings, and other disturbed (but usually damp) soil. | |
| Phenology | Flowering and fruiting August-October. | |
| Identification | Several of our beggarticks lack ray florets and can be difficult to tell apart without a good key. The website editors recommend Weakley (2024). Leaves of Strawstem Beggarticks are narrowly ovate or elliptical, simple (rarely with a pair of basal lobes), and toothed. Heads are produced singly at the 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. The quite similar B. connata has very narrow bracts, not at all leaf-like. | |
| Taxonomic Comments | Some authors lump it within the cosmopolitan species B. tripartita, which usually has 3-lobed leaves. A synonym is B. connata, which Weakley (2020, 2024) elevates to species status; we remain skeptical. See the B. connata species account for separation characters.
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| 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 [S3S4] | |
| Global Rank | G5T5 [G5] | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
