View source for Polygonum striatulum

{{Treatment/ID
|accepted_name=Polygonum striatulum
|accepted_authority=B. L. Robinson
|publications={{Treatment/Publication
|title=Proc. Boston Soc. Nat. Hist.
|place=31: 263. 1904
|year=1904
}}
|common_names=Texas knotweed
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Polygonum striatulum var. texense
|authority=(M. C. Johnston) Costea & Tardif
}} {{Treatment/ID/Synonym
|name=Polygonum texense
|authority=unknown
}}
|hierarchy=Polygonaceae;Polygonaceae subfam. Polygonoideae;Polygonum;Polygonum sect. Polygonum;Polygonum striatulum
|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. Polygonum]]</div><div class="higher-taxon"><small>species</small>[[Polygonum striatulum]]</div></div>
|volume=Volume 5
|mention_page=page 547, 548, 549
|treatment_page=page 550
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>perennial, light green, heterophyllous; rhizomes brown, 0.7–3 cm diam. <b>Stems</b> erect to ascending, sparingly branched in distal 1/2, not wiry, 25–60 cm. <b>Leaves</b>: ocrea 6–12 mm, proximal part cylindric, distal part soon disintegrating into brown fibers, later leaving almost no fibrous remains; petiole 0–2 mm; blade light green, linear-lanceolate to oblanceolate, 8–35 × 2–8 mm, margins flat, apex acute or obtuse; stem leaves 2.1–4 times as long as adjacent branch leaves; distal leaves sharply reduced, not overtopping flowers (shorter than or equaling flowers). <b>Inflorescences</b> axillary and terminal, spikelike; cymes in distal nodes, 2–6-flowered. <b>Pedicels</b> exserted from ocreae, 2–4 mm. <b>Flowers</b> semi-open; perianth 2–3.5 mm; tube 18–25% of perianth length; tepals overlapping, green with white or sometimes pink margins, petaloid, not keeled, oblong to obovate, cucullate; midveins usually unbranched; stamens 7–8. <b>Achenes</b> enclosed in perianth, brown, ovate, 3-gonous, (1.6–)1.8–2.6(–3) mm, faces subequal or unequal, apex not beaked, edges concave, shiny, smooth or roughened; late-season achenes common, 4–6 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering Dec–Mar or Jun–Oct.
|habitat=Seasonal moist places, sterile prairies, granitic soils
|elevation=100-700 m
|distribution=Tex.
|discussion=<p>Plants with leaves less-conspicuously veined, flowering August to October, and growing in seasonally moist habitats in central and western Texas are recognized by some authors as <i>Polygonum</i> texense or <i>P. striatulum</i> var. texense (M. Costea and F. J. Tardif 2003).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Polygonum striatulum
|author=
|authority=B. L. Robinson
|rank=species
|parent rank=section
|synonyms=Polygonum striatulum var. texense;Polygonum texense
|basionyms=
|family=Polygonaceae
|phenology=Flowering Dec–Mar or Jun–Oct.
|habitat=Seasonal moist places, sterile prairies, granitic soils
|elevation=100-700 m
|distribution=Tex.
|reference=None
|publication title=Proc. Boston Soc. Nat. Hist.
|publication year=1904
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V5/V5_1119.xml
|subfamily=Polygonaceae subfam. Polygonoideae
|genus=Polygonum
|section=Polygonum sect. Polygonum
|species=Polygonum striatulum
}}<!--

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