View source for Polygonum spergulariiforme

{{Treatment/ID
|accepted_name=Polygonum spergulariiforme
|accepted_authority=Meisner ex Small
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=19: 366. 1892
|year=1892
}}
|common_names=Spurry or fall knotweed
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Polygonum douglasii subsp. spergulariiforme
|authority=(Meisner ex Small) J. C. Hickman
}}{{Treatment/ID/Synonym
|name=Polygonum emaciatum
|authority=A. Nelson
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Duravia;Polygonum spergulariiforme
|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 spergulariiforme]]</div></div>
|volume=Volume 5
|mention_page=page 562, 568
|treatment_page=page 570
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs.</b> Stems erect, green, divaricately branched, not wiry, 5–50 cm, usually papillose-scabrid-ulous, rarely glabrescent. <b>Leaves</b> uniformly distributed, articulated to ocreae, basal leaves usually caducous, distal leaves abruptly reduced to bracts, articulated to ocreae; ocrea 8–12 mm, papillose-scabridulous, proximal part cylindric, distal part disintegrating into a few persistent fibers; petiole 0.1–2 mm; blade 1-veined, not pleated, linear to lanceolate, 35–60 × 1–3 mm, margins flat or narrowly revolute, smooth or papillose-denticulate, apex acute, mucronate. <b>Inflorescences</b> axillary and terminal, spikelike, dense; cymes crowded, ± overlapping at branch tips, 2–5-flowered. <b>Pedicels</b> enclosed in or slightly exserted from ocreae, erect to spreading, 0.5–2 mm. <b>Flowers</b> open or semi-open; perianth 3–5 mm; tube 9–17% of perianth length; tepals overlapping, uniformly pink or white, petaloid, oblong-obovate, cucullate, navicular in distal 1/4, apex rounded; midveins branched; stamens 8. <b>Achenes</b> enclosed in perianth, black, narrowly elliptic or elliptic-lanceolate to narrowly ovate, 3–5 mm, faces subequal, shiny, smooth to striate-tubercled.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Oct.
|habitat=Moist to dry, open rocky places, including serpentine
|elevation=10-2000 m
|distribution=B.C.;Calif.;Idaho;Mont.;Oreg.;Wash.;Wyo.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Polygonum spergulariiforme
|author=
|authority=Meisner ex Small
|rank=species
|parent rank=section
|synonyms=Polygonum douglasii subsp. spergulariiforme;Polygonum emaciatum
|basionyms=
|family=Polygonaceae
|phenology=Flowering Jun–Oct.
|habitat=Moist to dry, open rocky places, including serpentine
|elevation=10-2000 m
|distribution=B.C.;Calif.;Idaho;Mont.;Oreg.;Wash.;Wyo.
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=1892
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V5/V5_1168.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Duravia
|species=Polygonum spergulariiforme
}}<!--

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