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|Jepson eFlora: Taxon page
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|Family: Polygonaceae||View Description||Dichotomous Key|
|Genus: Polygonum||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Polygonum aviculare L.
Habit: Annual. Stem: prostrate to erect, 5--200 cm, glabrous, green, ribbed, branched. Leaf: distal > distal flowers; ocreae 3--15 mm, distally disintegrating to fibers or +- completely persistent; petiole 0.3--9 mm; blade 6--50(60) mm, 0.5--22 mm wide, narrowly elliptic, lanceolate, elliptic, or obovate, green to gray-green, margin flat, tip acute or rounded. Inflorescence: axillary; flowers 1--6(8), crowded distally or not; pedicels included to exserted, 1.5--5 mm. Flower: closed or half-open; perianth 1.8--5.5 mm, generally not pouched at base, +- green, margin white to red, tube 20--57% of length, lobes overlapped or not, not keeled, oblong to obovate, tip rounded, generally hood-shaped, midvein branched or not; stamens 5--8. Fruit: included or exserted, 1.2--4.2 mm, ovate, light- to dark-brown, dull, (2)3--angled, faces +- unequal, generally coarsely striate-tubercled; late-season common or not, 2--5 mm. Chromosomes: 2n=40,60.
Note: Taxonomically controversial, generally self-pollinated, self-fertilized, polyploid complex in which varieties to species have been named, but intergradation precludes recognition as species.
eFlora Treatment Author: Mihai Costea
Jepson Online Interchange
Previous taxon: Polygonum austiniae
Next taxon: Polygonum aviculare subsp. aviculare
Citation for this treatment: Mihai Costea 2017. Polygonum aviculare, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=39161, accessed on February 26, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 26, 2017.