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Polygonella Michaux. Subfamily: Polygonoideae. Tribe: Polygoneae. Common name: Jointweed.

Key to Polygonella

A genus of about 12-15 species, herbs and shrubs, of se. and sc. North America. Based on morphology, Ronse Decraene, Hong, & Smets (2004) suggested that Polygonella should be merged into Polygonum, as part of section Duravia; Schuster, Reveal, & Kron (2011) developed molecular evidence of the close relationship of Polygonella to the Duravia group of Polygonum and transferred the species into Polygonum. It now seems best to us to pursue an alternative course, of recognizing the very distinctive clades as separate genera – in our area, Polygonum s.s., Polygonella, and Duravia.

References: Brandbyge (1993) In Kubitzki, Rohwer, & Bittrich (1993); Carr (2016); Freeman (2005e) In Flora of North America Editorial Committee (2005); Horton (1961); Nesom & Bates (1984); Ronse Decraene, Hong, & Smets (2004) Brandbyge in Kubitzki, Rohwer, & Bittrich (1993); Schuster et al. (2015); Schuster, Reveal, & Kron (2011); Wunderlin (1981). Show full citations.

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Show species in Polygonella

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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Gary P. Fleming | Polygonella articulata | Original Image ⭷
image of plant© Alan M. Cressler | Polygonella myriophylla | Original Image ⭷
image of plant© Scott Ward | Polygonella ciliata | Original Image ⭷
image of plant© Scott Ward | Polygonella ciliata | Original Image ⭷
image of plant© Scott Ward | Polygonella robusta | Original Image ⭷
image of plant© Keith Bradley | Polygonella fimbriata | Original Image ⭷
image of plant© Scott Ward | Polygonella robusta | Original Image ⭷
image of plant© Scott Ward | Polygonella robusta | Original Image ⭷
image of plant© Scott Ward | Polygonella gracilis | Original Image ⭷
image of plant© Scott Ward | Polygonella basiramia | Original Image ⭷

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