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    Home»Herbs and Spices»Water smartweed
    Herbs and Spices

    Water smartweed

    By s mOctober 15, 2019Updated:October 15, 2019No Comments4 Mins Read
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    Water smartweed Quick Facts
    Name: Water smartweed
    Scientific Name: Persicaria amphibia
    Colors Dark-brown
    Shapes 2-3 mm, 1.6-2.6 mm wide, lens-shaped
    Water smartweed is perennial plants which adapts an aquatic life and blooms in water and abandoned on land. It is widespread in the Northern Hemisphere and got naturalized in South America, Mexico and Southern Africa. Plants are 1.5 meters tall. Stems are usually unbranched and thicken to form nodes at leaf joints. Aquatic forms have ovoid-conic to short cylindric inflorescences usually between 1 to 4 cm long. Aerial stems are prostate. Floating leaf blades are glabrous with rounded to acute apices. Stems form flowers in dense spikes which stand upright and in water it reaches to the height of 15 to 25 cm. Typically flower is 3 to 4 mm long and has five pink petals like segments and five protruding stamens.

    Plant description

    The herbaceous perennial plant has both terrestrial form as well as aquatic form. In form of terrestrial, it is 1 to 3 feet tall, more or less erect and either branched or sparingly branched. Leaves are alternate that occurs along entire length of terrestrial stems. Leaves are 2½-8 inches long and ½-3 inches across, narrowly lanceolate to lanceolate. Margins are entire or toothless. Upper surface of leaf is medium to dark green, glabrous to sparsely short pubescent. The lower surface is light green, glabrous and fine hairs occur along midvein and toward the leaf base. Leaf bases are wedge shaped or narrowly rounded and leaf tips are acute and slender. In aquatic form, stems of the plant are 6 feet long. The upper leaves float on the water surface. The leaf shape is lanceolate to oblong or elliptic to oblong having obtuse tips and rounded bases.  The upper surface and lower surface of the leaves are glabrous. The terrestrial plants have light green or yellowish green stems which are glabrous to pubescent, relatively stout and terete. Flowers are 4-6 mm long and each flower contains 5 pink to rosy pink sepals, five stamens with white filaments and pink anthers. Flowers are perfect and sometimes unisexual. Sepals are oval spreading outward slightly when fully open. The plant blooms from mid-summer to autumn and lasts for 2 to 3 months. Seeds are broadly ellipsoid or ovoid, somewhat flattened and brown measuring 2 to 3.5 mm long. Roots are stoloniferous or rhizomatous from which clonal plants develop. Fibrous roots form from nodes of stems and produce clonal plants.

    Leaves

    Leaves are alternate, lanceolate to ovate and 8 inches x 3 inches with smooth margins, tapering to a pointed tip. Leaf base is tapered to rounded, slightly heart shaped with short stout stalk forming sheath at the stem. Upper leaf surface does not have dark triangular or crescent shaped blotch. Margins of leaf blades are smooth and undulating with rough forward curving short stiff hair. The surfaces are green. Upper surface may contain appressed hairs. The underside mid veins is conspicuous. The ocrea (leaf stem) is tan to dark brown, cylindric with truncate to oblique margins. The ocrea surface is smooth but with appressed dense hairs without glands.

    Flowers

    Flowers are bright reddish to pink arranged in 1 to 2 dense, elongated, cylindrical to egg shaped flower clusters measuring 1 to 10 cm long at the top of thick flower stalk. The flowers of cup shaped have 5 sepals about 4 to 5 mm long which connects at the base and 8 protruding stamens. The terrestrial variety bears cylindrical flower clusters about 4 cm long. Aquatic variety has egg shaped flower clusters that measures 4 cm long. Flowers are bright pink, 1/8-inch across with five tepals and long pink tipped stamens.

    Fruit

    Fruit is a shiny or dull, smooth and dark brown seed.

    Close-view-of-Water-Smartweed-flower
    Plant-illustration-of-Water-Smartweed
    Water-Smartweed-plants
    Water-smartweed-flower
    Water-smartweeed-stem
    Water-smartweed-plantation
    [Show thumbnails]
    Medicinal uses

    • Infusion made with leaves and stems are used for treating stomach pains or diarrhea in children.
    • Roots are consumed raw or infusion made with dried roots is used for treating chest colds.
    • Apply the poultice of fresh roots to the mouth for treating blisters.

    Culinary uses

    • Cook the leaves or consume it raw.
    • Cook the young shoots.

    References:

    https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=823854#null

    https://pfaf.org/user/Plant.aspx?LatinName=Persicaria+amphibia

    http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=69778

    https://www.illinoiswildflowers.info/wetland/plants/wt_smartweed.html

    https://www.americansouthwest.net/plants/wildflowers/persicaria-amphibia.html

    https://www.friendsofthewildflowergarden.org/pages/plants/smartweed_water.html

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    Name Water smartweed
    Scientific Name Persicaria amphibia
    Common/English Name Willow Grass, Longroot smartweed, Water knotweed, Water smartweed, Amphibious bistor, Swamp Smartweed, Swamp Knotweed, Water Heart’s-ease, Tanweed, Tansy Mustard, Devil’s Shoestring
    Name in Other Languages Arabic: Assâ er râ’ î;
    Chinese: Liang qi liao, Tian liao, Liang qi liao;
    Danish: Sumphirse, Vand-Pileurt;
    Dutch: Waterwilg, Veenwortel, Watersmerte;
    English: Amphibious knotweed, Amphibious bistort, Water smartweed, Amphibious persicaria, Water persicaria;
    Estonian: Vesi-kirburohi;
    Finnish: Vesitatar;
    French: Persicaire amphibie, Persicaire flottante, Renouée amphibie;
    German: Flöhkraut, Wasserknöterich, Sumpf-Knöterich;
    Italian: Persicaria anfibia;
    Norwegian Bokmål: Vasslirekne;
    Nynorsk, Norwegian: Vasslirekne;
    Polish: Rdest ziemnowodny;
    Spanish: Persicaria anfibia, Polígono anfibio;
    Swedish: Vattenpilört, Grodpilört;
    Turkish: Çoban dayaghi, Çoban deghinaghi
    Plant Growth Habit Perennial
    Plant Size 1.5 m tall
    Stem Prostrate to erect, 20-120 cm
    Leaf Alternate, 2 to 15 cm long, 1 to 6 cm wide
    Flowering Season Mid-summer into autumn
    Flower Bright reddish-pink, 1-10 cm long
    Fruit shape & size 2-3 mm, 1.6-2.6 mm wide, lens-shaped
    Fruit color Dark-brown
    Seed Dark brown, lentil-shaped, 2-3 mm long

    Water smartweed Scientific Classification

    Scientific Name: Persicaria amphibia

    Rank Scientific Name & (Common Name)
    Kingdom Plantae (Plants)
    Subkingdom Viridiplantae  (Green plants)
    Infrakingdom Streptophyta  (Land plants)
    Superdivision Embryophyta
    Division Tracheophyta  (Vascular plants, tracheophytes)
    Class Magnoliopsida
    Order Caryophyllales
    Family Polygonaceae (Knotweed, renouées, buckwheat)
    Genus Persicaria (L.) Mill. (Smartweed)
    Species Persicaria amphibia (L.) Delarbre (Water knotweed)
    Synonyms
    • Chulusium amphibium (L.) Raf.
    • Chulusium fluitans Raf.
    • Persicaria amphibia (L.) Delarbre
    • Persicaria amphibia subsp. amurensis Soják
    • Persicaria amphibia var. amurensis (Korsh.) H.Hara
    • Persicaria amphibia var. natans (Leyss.) A.H.Munshi & G.N.Javeid
    • Persicaria amphibia var. terrestre (L.) Delarbe
    • Persicaria amphibia var. terrestris (Leyss.) A.H.Munshi & G.N.Javeid
    • Persicaria amurensis Nieuwl.
    • Persicaria fluitans Montandon
    • Persicaria nebraskensis Greene
    • Polygonum amphibia subsp. amurensis (Korsh.) Sojak
    • Polygonum amphibium L.
    • Polygonum amphibium f. terrestris (Leers) Kitag.
    • Polygonum amphibium subsp. amurense (Korsh.) Hult.
    • Polygonum amphibium subsp. aquaticum Ehrh., 1780
    • Polygonum amphibium var. amurense Korsh.
    • Polygonum amphibium var. amurensis Korsh.
    • Polygonum amphibium var. aquaticum Leers
    • Polygonum amphibium var. muehlenbergii Meisn.
    • Polygonum amphibium var. natans Leyss.
    • Polygonum amphibium var. terrestre Leers
    • Polygonum amphibium var. terrestre Leyss.
    • Polygonum amphibium var. terrestre Willd.
    • Polygonum amphibium var. vestitum Hemsl.
    • Polygonum amurense (Korsh.) Vorosch.
    • Polygonum amurense (Korsh.) Worosch.
    • Polygonum aquaticum A.Gray
    • Polygonum aquaticum A.Gray ex Meisn.
    • Polygonum bistorta Walt.
    • Polygonum coccineum var. terrestre (Willd.) Willd.
    • Polygonum muehlenbergii var. terrestre (Willd.) Trel.
    • Polygonum muhlenbergii var. terrestre (Willd.) Trel.
    • Polygonum natans Gueldenst.
    • Polygonum platyphyllum Gand., 1882
    • Polygonum purpureum Gilib.
    • Polygonum salicifolium Schur
    • Polygonum terrestre (Willd.) Britton, Sterns & Poggenb.
    • Polygonum terrestre (Willd.) Hegetschw.
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