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Fam.: Polygonaceae / Knotweed Fam.  

Synon.:  Polygonum aviculare  L.  subsp. rurivagum  (JORD. ex BOREAU) BERHER

Genus:  Polygonum  L.
 

Authors:
   JORD.:  Claude Thomas Alexis Jordan (1814 - 1897), French botanist
   BOREAU:  Alexandre Boreau (1803 - 1875), French pharmacist and botanist in the region Maine-et-Loire
   L.:  Carl von Linné (Linnaeus, 1707 - 1777), Swedish naturalist who introduced the binary naming system for plants and animals
   BERHER:  Eugene-Laurent Berher (1822 - 1900), French botanist
 

Etymology:
   Polygonum:   polys = many, gone = offspring
   rurivagum:   country-wandering
   aviculare:   eaten by birds
 

Polygonum rurivagum is closely related to Polygonum aviculare. Polygonum rurivagum has rather narrower leaves. The perianth is short and open at the top. Polygonum rurivagum often only has one to three flowers in the leaf axils, Polygonum aviculare can have more. In Polygonum rurivagum, the leaves on the main stem are typically larger than those at the side branches.

 

Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Bensheim 5.7.2007
Fig. 1:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Bensheim 5.7.2007
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Bensheim 5.7.2007
Fig. 2:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Bensheim 5.7.2007
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Bensheim 5.7.2007
Fig. 3:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Bensheim 5.7.2007
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Bensheim 5.7.2007
Fig. 4:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Bensheim 5.7.2007
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Bensheim 5.7.2007
Fig. 5:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Bensheim 5.7.2007
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Bensheim 5.7.2007
Fig. 6:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Bensheim 5.7.2007
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Neckargemünd 30.7.2006
Fig. 7:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Neckargemünd 30.7.2006
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Neckargemünd 30.7.2006
Fig. 8:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Neckargemünd 30.7.2006
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Neckargemünd 30.7.2006
Fig. 9:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Neckargemünd 30.7.2006
Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed, D Neckargemünd 30.7.2006
Fig. 10:  Polygonum rurivagum / Cornfield Knotgrass, Narrow-Leaf Knotweed
D Neckargemünd 30.7.2006

 


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