View source for Polygonum engelmannii

{{Treatment/ID
|accepted_name=Polygonum engelmannii
|accepted_authority=Greene
|publications={{Treatment/Publication
|title=Bull. Calif. Acad. Sci.
|place=1: 126. 1885
|year=1885
}}
|common_names=Engelmann’s knotweed
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Polygonum douglasii subsp. engelmannii
|authority=(Greene) Kartesz & Gandhi
|rank=subspecies
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Duravia;Polygonum engelmannii
|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 engelmannii]]</div></div>
|volume=Volume 5
|mention_page=page 562
|treatment_page=page 569
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs.</b> Stems erect, green or purplish brown, branched from base, not wiry, 4–30 cm, glabrous or minutely papillose-scabridulous. <b>Leaves</b> uniformly distributed, articulated to ocreae, basal leaves persistent, distal leaves abruptly reduced to bracts; ocrea 3–5 mm, papillose-scabridulous or glabrous, proximal part funnelform, distal part becoming lacerate with age; petiole 0.1–2 mm; blade 1-veined, not pleated, linear-oblanceolate, 10–20(–25) × 1–3(–4) mm, margins revolute, smooth, apex acute to mucronate. <b>Inflorescences</b> axillary and terminal, spikelike, loosely floriferous nearly to base, elongate; cymes spaced along branches, (1–)2–4-flowered. <b>Pedicels</b> exserted from ocreae, reflexed, 1–3 mm. <b>Flowers</b> closed; perianth 1.5–2(–2.5) mm; tube 18–26% of perianth length; tepals initially overlapping and cucullate, later forced apart by developing achene, greenish or sometimes purple, with white margins, petaloid or sepaloid, oblong, ± flat or navicular, apex rounded; midveins unbranched; stamens 5–8. <b>Achenes</b> exserted from perianth, black, elliptic, 1.2–2.3 mm, faces subequal, shiny, smooth.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Sep.
|habitat=Dry to moist sandy or well-drained soils, sagebrush desert to lower mountains
|elevation=1000-1500 m
|distribution=Alta.;B.C.;Colo.;Idaho;Mont.;Nev.;S.Dak.;Utah;Wyo.
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Polygonum engelmannii
|authority=Greene
|rank=species
|parent rank=section
|synonyms=Polygonum douglasii subsp. engelmannii
|basionyms=
|family=Polygonaceae
|phenology=Flowering Jun–Sep.
|habitat=Dry to moist sandy or well-drained soils, sagebrush desert to lower mountains
|elevation=1000-1500 m
|distribution=Alta.;B.C.;Colo.;Idaho;Mont.;Nev.;S.Dak.;Utah;Wyo.
|reference=None
|publication title=Bull. Calif. Acad. Sci.
|publication year=1885
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V5/V5_1164.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Duravia
|species=Polygonum engelmannii
}}<!--

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