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|Family: Polygonaceae||View Description||Dichotomous Key|
|Genus: Persicaria||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Persicaria orientalis (L.) Spach
Habit: Annual, rhizomes, stolons 0. Stem: erect, 50--200(250) cm, +- glabrous to hairy, +- ribbed. Leaf: ocrea funnel-shaped, 10--20(25) mm, brown, papery at base, leaf-like distally, margins truncate, ciliate, bristles 1--3 mm, surface strigose, not gland-dotted; petiole 1--9(14) cm; blade 4--25(30) cm, 2--16 cm wide, ovate, scabrous on midveins, strigose to densely hairy especially along veins, not +- gland-dotted, not dark blotched adaxially, base wedge-shaped, tip acute to acuminate. Inflorescence: axillary, terminal, spike-like, nodding or erect, not interrupted, 20--180 mm, 5--20 mm wide; flowers 1--5; peduncle (0)10--50 mm, glabrous, gland-dotted; bractlets not overlapped; pedicels ascending to spreading, 1--5 mm. Flower: perianth +- bell-shaped, 3--4.5 mm, pink to dark pink, not gland-dotted, lobes 5, obovate, margins of same color, veins +- prominent or not, not anchor-shaped, tips obtuse to rounded; stamens 6--8, included or exserted, anthers pink or red; styles 2, fused basally. Fruit: included, 2--3.5 mm, 1.5--3 mm wide, lens-shaped, dark brown to black, shiny to dull, minutely rough. Chromosomes: 2n=22.
Ecology: Escaped from cultivation in disturbed places (most likely dispersed by birds); Elevation: < 1500 m. Bioregional Distribution: ScV, SCoRO; Distribution Outside California: western and eastern North America; native to Asia.
eFlora Treatment Author: Mihai Costea
Jepson Online Interchange
Previous taxon: Persicaria maculosa
Next taxon: Persicaria pensylvanica
Citation for this treatment: Mihai Costea 2016. Persicaria orientalis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=37294, accessed on May 31, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 31, 2016.