Polygonum spp.
Family: Polygonaceae
Polygonum image
Anthony Mendoza  
Herbs, shrubs, or subshrubs, annual (perennial in P. striatulum), homophyllous or heterophyllous, sometimes heterocarpic; roots fibrous or woody. Stems prostrate to erect, glabrous, smooth or sometimes papillous-scabridulous. Leaves cauline, alternate (opposite in P. humifusum), petiolate or sessile; ocrea with distal part persistent, often hyaline, white or silvery, 2-lobed, chartaceous, glabrous, disintegrating into fibers, or disintegrating completely; petiole base articulated with ocrea or not; blade linear, lanceolate, elliptic, ovate, or subround, margins entire. Inflorescences axillary or axillary and terminal, spikelike, or flowers solitary; peduncle absent. Pedicels present or absent. Flowers bisexual, 1-7(-10) per ocreate fascicle, base not stipelike; perianth nonaccrescent, white or greenish white to pink, campanulate to urceolate, glabrous; tepals 5, connate 3-70% of their length, petaloid or sepaloid, monomorphic or, rarely, dimorphic, the inner usually flat, the outer flat or sometimes keeled and cucullate distally, sometimes of different length than the inner; stamens 3-8 (some may be reduced to staminodes); filaments distinct, free or adnate to perianth tube, glabrous; anthers whitish yellow, pink to purple or orange-pink, elliptic to oblong; styles (2-)3, mostly spreading, distinct or connate proximally; stigmas 2-3, capitate. Achenes included or exserted, yellow-green, brown, or black, unwinged, (2-)3-gonous, glabrous. Seeds: embryo curved. x = 10.
Image of Aconogonum smallii
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Image of Persicaria laxmannii
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Image of Polygonum alaskanum
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Image of Polygonum bungeanum
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Image of Polygonum coarctatum
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Image of Polygonum corrigioloides
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Image of Polygonum cristatum
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Image of Polygonum dumetorum
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Image of Polygonum emersum
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Image of Polygonum fowleri
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Image of Polygonum greenei
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Image of Polygonum marinense
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Image of Polygonum microcephalum
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Image of Polygonum muhlenbergii
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Image of Polygonum newberryi
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Image of Polygonum oxyspermum
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Image of Polygonum paronychioides
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Image of Polygonum perfoliatum
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Image of Polygonum plumosum
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Image of Polygonum polymorphum
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Image of Polygonum portoricense
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Image of Polygonum pringlei
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Image of Polygonum rubescens
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Image of Polygonum vagans
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Image of Polygonum zuccarinii
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