[Knotweeds and
Smartweeds: The Genera Aconogonon, Fallopia, Persicaria and Polygonum in the Columbia River Gorge of Oregon and Washington]
Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb
Persicaria maculosa
Synonym: Polygonum persicaria
![Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)](../../../../gorge/3petal/buck/polygonum/persicaria/maculosa2f.jpg)
Spotted ladysthumb as seen on a sandbar on the west bank of the Deschutes River just upstream of Heritage Park..........July 27, 2011.
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- ![Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)](../../../../gorge/3petal/buck/polygonum/persicaria/maculosa08-31-2015b.jpg)
Spotted ladysthumb along the Columbia River shoreline at the east end of Captain William Clark Park, Washougal, WA.........August 31, 2015.
- ![Stem leaf of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)](../../../../gorge/3petal/buck/polygonum/persicaria/maculosa2b.jpg)
- ![Stem leaf of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)](../../../../gorge/3petal/buck/polygonum/persicaria/maculosa2e.jpg)
- ![Inflorescence of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)](../../../../gorge/3petal/buck/polygonum/persicaria/maculosa2c.jpg)
Additional close-up photos of spotted ladysthumb as seen on a sandbar on the west bank of the Deschutes River just upstream of Heritage Park.........July 27, 2011.
![Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)](../../../../gorge/3petal/buck/polygonum/persicaria/persicaria1a.jpg)
The photo above shows ladysthumb as seen on the beach at the Dalles Riverside Park.........September 29, 2007. The racemes are shorter than those of the similar willoweed Polygonum lapathifolium.
![Spotted leaf of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)](../../../../gorge/3petal/buck/polygonum/persicaria/persicaria1b.jpg)
The photo above shows a stem leaf of ladysthumb from the Dalles Riverside Park. The similar willoweed Polygonum lapathifolium commonly has leaves lacking the large purple spot at mid-leaf.
Paul Slichter