Weed
prostrate knotweed, yard knotweed
AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
Triangular and ovateOvate:
Egg-shaped with basal end the broadest.
Reddish-brown
Sides rough; edges smooth and shiny.
Remnants or entire floral parts present. Edges are rounded.
AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat. sides are not always equal in width. It is not unusual to find achenesAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat. with all the floral structures intact. The flat surfaces are rough with minute tubercles, whereas the corners are smooth and shiny. Note that the linear embryoEmbryo:
A rudimentary plant contained in a seed, usually consisting of a more or less differentiated axis and attached cotyledon(s).
is located in the corners of Polygonum sp.
Not listed
Included
For more information, see ISMA fact sheet.
Polygonaceae
Polygonum aviculare L.
