[Knotweeds: The Genera Aconogonon, Bistorta, Fallopia, Persicaria and Polygonum in Mt. Adams Country]

Curltop Ladysthumb, Dock-leaf Smartweed, Pale Smartweed, Willow Weed

Persicaria lapathifolia

Synonyms: Polygonum incarnatum, Polygonum lapathifolium, Polygonum lapathifolium var. salicifolium, Polygoum linicola, Polygonum nodosum, Polygonum scabrum, Polygonum tomentosum

Inflorescence of Curltop Ladysthumb, Dock-leaf Smartweed, Pale Smartweed, Willow Weed: Persicaria lapathifolia (Synonyms: Polygonum incarnatum, Polygonum lapathifolium, Polygonum lapathifolium var. salicifolium, Polygoum linicola, Polygonum nodosum, Polygonum scabrum, Polygonum tomentosum)

The photos on this page were taken along Road #23 at the Mt. Adams Viewpoint about one-half mile south of the intersection with Road 8810........September 25, 2005. As seen here, willow-weed typically has several to many axillary racemes each less than 3 cm long at the distal end of the stem.

Leaf of Curltop Ladysthumb, Dock-leaf Smartweed, Pale Smartweed, Willow Weed: Persicaria lapathifolia (Synonyms: Polygonum incarnatum, Polygonum lapathifolium, Polygonum lapathifolium var. salicifolium, Polygoum linicola, Polygonum nodosum, Polygonum scabrum, Polygonum tomentosum)

The similar Polygonum persicaria commonly has purple-spotted leaves.

A close-up of a leaf stipule of Curltop Ladysthumb, Dock-leaf Smartweed, Pale Smartweed, Willow Weed: Persicaria lapathifolia (Synonyms: Polygonum incarnatum, Polygonum lapathifolium, Polygonum lapathifolium var. salicifolium, Polygoum linicola, Polygonum nodosum, Polygonum scabrum, Polygonum tomentosum)

A close-up of a leaf stipule of Curltop Ladysthumb.

Paul Slichter