[The Knotweeds and Smartweeds of 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)

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) - 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)

Spotted ladysthumb along the Columbia River shoreline at the east end of Captain William Clark Park, Washougal, WA.........August 31, 2015.

Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria) - Stem leaf of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)

Stipule sheath of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria) - Stem leaf of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)

Inflorescence of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria) - Inflorescence of Heartweed, Redshank, Spotted Ladysthumb, Spotted Lady's-thumb: Persicaria maculosa (Synonym: Polygonum persicaria)

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)

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)

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