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Polygonum cognatum Meisn. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Monographiae Generis Polygoni Prodromus 91. 1826. (Monogr. Polyg.) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: Two subspecies are recognized in our region.

 

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Perennial, prostrate or ascending branched herb, 15-30 cm long with a thick stout root stock, ± woody at base, stem angular, with very short internodes, glabrous or puberulous. Leaves shortly petiolate, petiole 2-5 mm long, lamina elliptic or elliptic-oblong, rarely ovate-spathulate, acute or obtuse, margin entire, sometimes recurved, uninerved or sometimes nerves obscure, ± fleshy, 0.5-2.75 x 0.3-1.5 cm. Ochreae ovate, hyaline, silvery, nerves 2, included 2-5 mm long. Flowers axillary, 2 in each axil, 1.5-1.75 mm across, white, pedicel up to 1.0 mm long, perianth lobes 5, tepals ± orbicular, urceolate, tube thick, as long as the lobes. Stamens 5, filaments broad at base, 0.25-0.5 mm long. Styles 2-3 with ± rounded stigmas; ovary trigonous, 1-2 mm long. Nut ovate-trigonous, usually compressed, black or dark brown, c. 3 x 1.5 (-2) mm shining enclosed within the thickened perianth.
 

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1 Styles 3. Nuts clearly triquetrous. 5a Polygonum cognatum Meisn. subsp. cognatum
+ Styles 2. Nuts not clearly triquetrous but ± aplanate. 5b Polygonum cognatum subsp. chitralicum
 
 
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