View source for Amaranthus tamaulipensis

{{Treatment/ID
|accepted_name=Amaranthus tamaulipensis
|accepted_authority=Henrickson
|publications={{Treatment/Publication
|title=Sida
|place=18: 800, f igs. 4G, 5, 8, map. 1999
|year=1999
}}
|basionyms=
|synonyms=
|hierarchy=Amaranthaceae;Amaranthus;Amaranthus subg. Amaranthus;Amaranthus tamaulipensis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Amaranthaceae]]</div><div class="higher-taxon"><small>genus</small>[[Amaranthus]]</div><div class="higher-taxon"><small>subgenus</small>[[Amaranthus subg. Amaranthus]]</div><div class="higher-taxon"><small>species</small>[[Amaranthus tamaulipensis]]</div></div>
|volume=Volume 4
|mention_page=page 413, 414
|treatment_page=page 426
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>glabrous. <b>Stems</b> erect or ascending (sometimes prostrate), stramineous or suffused with red, branched at base, sparsely branched to simple distally, 15–30(–60) cm. <b>Leaves</b>: petiole 1/2 as long as to equaling blade; blade ovate or rhombic-ovate, 1–2.7 × 0.5–1.5 cm, base cuneate to broadly cuneate, margins entire, plane or slightly undulate (rarely erose), apex obtuse, rounded, or broadly cuneate, with mucro. <b>Inflorescences</b> axial glomerules from base of plant to tip, interrupted at nodes or crowded in terminal, leafy spikes. <b>Bracts</b> lanceolate-ovate to lanceolate, shorter than tepals, apex acute. <b>Pistillate</b> flowers: tepals 5, not imbricate, distal parts expanded, oblong-spatulate, subequal, 1.1–1.6(–2.1) mm, scarious, margins entire, apex obtuse or rounded, with excurrent midrib; style branches erect; stigmas 3. <b>Staminate</b> flowers: basal and scattered on lateral shoots; tepals 4–5, oblong-ovate, equal, 1.2–1.6 mm, apex acute to acuminate; stamens 3(–4). <b>Utricles</b> brownish at maturity, obovoid to obpyramidal, slightly biconvex, 1.5–1.7 mm, longer than tepals, rugose to tuberculate, dehiscence regularly circumscissile. <b>Seeds</b> black to reddish brown, lenticular to subglobose, 1–1.2 mm, smooth, shiny.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring–fall.
|habitat=Disturbed habitats
|elevation=0-100 m
|distribution=Tex.;Mexico (San Luis Potosí;Tabasco;Tamaulipas).
|discussion=<p><i>Amaranthus tamaulipensis</i> seems to be related to <i>A. brandegeei</i> Standley sensu stricto, which was described from northern Mexico, and <i>A. dubius</i>. According to Henrickson, <i>A. tamaulipensis</i> differs from <i>A. brandegeei</i> in having erect, not reflexed, tepals; from <i>A. dubius</i> it can be distinguished by the characters of its tepals, distinctly rugose, not smooth, fruits with smooth, turban-shaped style base, and three stamens. The proper placement and taxonomic status of <i>A. tamaulipensis</i> remain problematic and need further study.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Amaranthus tamaulipensis
|authority=Henrickson
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=
|family=Amaranthaceae
|phenology=Flowering spring–fall.
|habitat=Disturbed habitats
|elevation=0-100 m
|distribution=Tex.;Mexico (San Luis Potosí;Tabasco;Tamaulipas).
|reference=None
|publication title=Sida
|publication year=1999
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V4/V4_832.xml
|genus=Amaranthus
|subgenus=Amaranthus subg. Amaranthus
|species=Amaranthus tamaulipensis
}}<!--

-->[[Category:Treatment]][[Category:Amaranthus subg. Amaranthus]]