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Not a grass. Tiny white flowers. Astringent, diuretic, coagulant, expectorant. Used for dysentery, heavy menstrual, lung, bronchitis, mucus, jaundice, liver, gallstones, kidney stones.
Edible Plant Guide © 2012 Markus Rothkranz
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(Polygonum aviculare), a plant of the family Po-lygonaceae. An annual with a very variable erect or prostrate stem, knotgrass has entire and alternate leaves. The flowers, which are solitary or few, are in the leaf axils. The perianth segments are greenish with white or pink margins.

Knotgrass grows almost everywhere—along roads, in pastures, and as a weed in crops. It is a valuable pasture plant for cattle and poultry, since it withstands trampling and close grazing well. An extract from the grass is used as a styptic and diuretic. Knotgrass is considered by many to be an aggregate species, including a large number of small species.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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The plant species used in this experiment, tifton 85 grass, knotgrass and mint, presented good growth performance during the experiment.
Seeds of grain amaranth, barnyard grass, veronica, red clover, common lambsquarters, common knotgrass, plantain and annual bluegrass were collected in the wild from June to October 2011.
Just to see the pictures of what they had imagined for Knotgrass and all the characters was wonderful.
Although Beamish has responded almost exclusively to commission for specific instruments, her greatest compositional freedom was evidenced with her work Knotgrass Elegy.
These grasses often grow in company with sea knotgrass (Polygonum maritimum) and the sedge Cyperus capitatus.
Dormant knotgrass (Paspalum distichum L.) seed imbibed water, but the hull and seed coat membranes did not permit germination (Huang and Hsiao, 1987).
Subordinate streamside vegetation is comprised of seepwillow baccharis (Baccharis salicifolia), which is dominant, deergrass (Muhlenbergia rigens), cattail (Typha latifolia), annual spikesedge (Eleocharis caribaea), Grisebach bristlegrass (Setaria grisebachii), plains bristlegrass (Setaria leucopila), barnyard grass (Echinochloa crusgalli), knotgrass (Paspalum distichum) and water bentgrass (Agrostis semiverticillata).
It is also known as quack grass, couch grass, wheat grass, quitch grass, Shelly grass, knotgrass, devil's grass, and scutch grass and if you still don't know what I'm talking about, its Latin name is Agropyron repens.
In fact some gardeners have been put off this wonderful range of plants because of the reputations of Japanese Knotweed, the mile and minute vine, common docks and weeds such as knotgrass. However, there are a good number of relatives of our common broad-leaved dock that can add a nice splash of colour to the late summer and autumn garden.
Pollen of sorrel/sheep.s sorrel (Rumex acetosa/acetosella type) and cornflower (Centaurea cyanus) is connected with agriculture, settlement weeds are greater/hoary plantain (Plantago major/media type) and knotgrass (Polygonum aviculare), cabbage family (Brassicaceae), wormwood (Artemisia), goosefoot family (Chenopodiaceae).
A Electroacupuncture can give great relief as can knotgrass complex - 15 drops, twice daily - to reduce the inflammation while strengthening the connective tissue around the joints.
For arthritic conditions involving calcified deposits in the joints such as gout, Knotgrass Complex is a unique combination of herbs that works to dissolve the deposits,improving joint mobility and strengthening the soft tissue around the joint.