[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)](unidpolygonuminfl.jpg)
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)](unidpolygonumlf.jpg)
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)](unidpolygonumstipules.jpg)
A close-up of a leaf stipule of Curltop Ladysthumb.
Paul Slichter