View source for Polygonum majus

{{Treatment/ID
|accepted_name=Polygonum majus
|accepted_authority=(Meisner) Piper
|publications={{Treatment/Publication
|title=Fl. Palouse Reg.,
|place=63. 1901
|year=1901
}}
|common_names=Wiry knotweed
|basionyms={{Treatment/ID/Basionym
|name=Polygonum coarctatum var. majus
|authority=Meisner
|publication_title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication_place=14: 101. 1856
}}
|synonyms={{Treatment/ID/Synonym
|name=Polygonum douglasii subsp. majus
|authority=(Meisner) J. C. Hickman
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Duravia;Polygonum majus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polygonaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Polygonaceae subfam. Polygonoideae]]</div><div class="higher-taxon"><small>genus</small>[[Polygonum]]</div><div class="higher-taxon"><small>section</small>[[Polygonum sect. Duravia]]</div><div class="higher-taxon"><small>species</small>[[Polygonum majus]]</div></div>
|volume=Volume 5
|mention_page=page 561, 562, 568
|treatment_page=page 570
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs.</b> Stems erect, green, simple or branched, ± wiry, 15–60 cm, usually papillose-scabridulous. <b>Leaves</b> uniformly distributed, articulated to ocreae, basal leaves often caducous, distal leaves abruptly reduced to bracts, articulated to ocreae; ocrea 5–12 mm, glabrous or papillose-scabridulous, proximal part cylindric, distal part lacerate or disintegrating into fibers; petiole 0.1–2 mm; blade 1-veined, not pleated, linear to narrowly oblong or lanceolate, 15–70 × 2–8 mm, margins revolute, papillose-denticulate, apex acute or mucronate. <b>Inflorescences</b> axillary and terminal, spikelike, elongate; cymes spaced along branches, 2–5-flowered. <b>Pedicels</b> exserted from ocreae, reflexed, 0.5–1 mm. <b>Flowers</b> open or semi-open; perianth (3.5–)4–5 mm; tube 9–17% of perianth length; tepals overlapping, uniformly white to pink, petaloid, oblong to oblong-obovate, cucullate, navicular in distal 1/4, apex rounded; midveins unbranched or with short lateral branches; stamens 8. <b>Achenes</b> enclosed in perianth, black, elliptic, 3.5–5 mm, faces subequal, shiny or dull, smooth or striate-tubercled.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Aug.
|habitat=Dry plains, meadows, sometimes on serpentine
|elevation=500-2000 m
|distribution=B.C.;Calif.;Colo.;Idaho;Nev.;Oreg.;Utah;Wash.;Wyo.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Polygonum majus
|author=
|authority=(Meisner) Piper
|rank=species
|parent rank=section
|synonyms=Polygonum douglasii subsp. majus
|basionyms=Polygonum coarctatum var. majus
|family=Polygonaceae
|phenology=Flowering May–Aug.
|habitat=Dry plains, meadows, sometimes on serpentine
|elevation=500-2000 m
|distribution=B.C.;Calif.;Colo.;Idaho;Nev.;Oreg.;Utah;Wash.;Wyo.
|reference=None
|publication title=Fl. Palouse Reg.,
|publication year=1901
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V5/V5_1169.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Duravia
|species=Polygonum majus
}}<!--

-->[[Category:Treatment]][[Category:Polygonum sect. Duravia]]