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|Family: Polygonaceae||View Description||Dichotomous Key|
|Genus: Persicaria||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Persicaria hydropiper (L.) Delarbre
Habit: Annual, rhizomes, stolons 0. Stem: ascending to erect, 20--60(100) cm, gland-dotted. Leaf: ocrea 8--15 mm, brown, cylindric or funnel-shaped, margins truncate, ciliate, bristles 1--4 mm, surface glabrous or strigose, generally gland-dotted; petiole 0--0.8 cm; blade (1.5)4--10(15) cm, 0.4--2.5 cm wide, lanceolate to narrowly diamond-shaped, glabrous or scabrous on midveins, +- gland-dotted, adaxial dark blotch 0, base wedge-shaped, tip acute to acuminate. Inflorescence: axillary, terminal, erect or nodding, interrupted or not distally, 30--180 mm, 5--9 mm wide; peduncle (0)10--50 mm, glabrous, gland-dotted; bractlets not overlapped; pedicels ascending, 1--3 mm; flowers 1--3(5). Flower: perianth 2--3.5 mm, +- bell-shaped, gland-dotted, green-white or pink, lobes 4--5, obovate, margins +- red, veins +- prominent, not anchor-shaped, tips obtuse to rounded; stamens 6--8, included, anthers pink or red; styles 2--3, fused basally. Fruit: included or exserted, 2--3 mm, 1.5--2 mm wide, lens-shaped or 3-angled, brown-black, dull, minutely rough. Chromosomes: 2n=20.
Ecology: Shores of lakes, ponds, riverbanks, forested wetlands, pastures, disturbed ground; Elevation: < 1500 m. Bioregional Distribution: n&c CA-FP; Distribution Outside California: to northern and eastern North America, also Asia, Africa, Australia; native to Europe. Flowering Time: May--Dec
Synonyms: Polygonum hydropiper L.
eFlora Treatment Author: Mihai Costea
Jepson Online Interchange
Previous taxon: Persicaria capitata
Next taxon: Persicaria hydropiperoides
Citation for this treatment: Mihai Costea 2016. Persicaria hydropiper, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=37286, accessed on October 20, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on October 20, 2016.