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Polygonaceae Gallery - the Knotweed family

The Knotweed family comprises nearly 1400 species, mostly perennials. This family includes docks, sorrels and knotweeds as well as many weeds of cultivation, most prominently in northern temperate zones.

These thumbnail pictures have links to larger photographs and information about each of the species, their habitat needs and an identification guide.

We have used the scientific names to identify species in this table, but if you prefer to use common names we have also listed all species covered on the First Nature website in alphabetical order of Common Names...

There is also the option to see all species listed in order of Scientific Names or Botanical Families or Dominant Colour.

Introduction to wild flower families...


Wildflowers in the Algarve, an introductory guide, by Sue Parker

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