View source for Ludwigia spathulata

{{Treatment/ID
|accepted_name=Ludwigia spathulata
|accepted_authority=Torrey & A. Gray
|publications={{Treatment/Publication
|title=Fl. N. Amer.
|place=1: 526. 1840
|year=1840
}}
|common_names=Spoon primrose-willow;southern water purslane
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Isnardia spathulata
|authority=(Torrey & A. Gray) Kuntze
|rank=species
}}
|hierarchy=Onagraceae;Onagraceae subfam. Ludwigioideae;Ludwigia;Ludwigia sect. Isnardia;Ludwigia spathulata
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Onagraceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Onagraceae subfam. Ludwigioideae]]</div><div class="higher-taxon"><small>genus</small>[[Ludwigia]]</div><div class="higher-taxon"><small>section</small>[[Ludwigia sect. Isnardia]]</div><div class="higher-taxon"><small>species</small>[[Ludwigia spathulata]]</div></div>
|volume=Volume 10
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>creeping and rooting at nodes, often forming mats. <b>Stems</b> prostrate or decumbent and ascending distally, slightly ridged, well branched, 10–40cm, densely strigillose throughout. <b>Leaves</b> opposite; stipules narrowly deltate or ovate, 0.05–0.15 × 0.05–0.1 mm; petiole very narrowly winged, 0.3–0.9 cm, blade elliptic-spatulate or narrowly so, 0.9–1.7 × 0.3–0.9 cm, base attenuate, margins entire, apex acute, surfaces strigillose; bracts not reduced except at branch tips. <b>Inflorescences</b> leafy spikes or racemes, flowers usually paired in leaf axils; bracteoles attached at base of ovary or on short pedicel, narrowly oblong or oblanceolate, 0.2–0.8 × 0.05–0.2 mm, apex acute, often obscured by hairs. <b>Flowers</b>: sepals ascending, pale green, broadly ovate-deltate, 1–1.7 × 1.1–1.7 mm, margins entire, apex acuminate, surfaces densely strigillose; petals 0; filaments translucent, 0.5–0.8 mm, anthers 0.2–0.4 × 0.3–0.5 mm; pollen shed singly; ovary oblong-obovoid, 4-angled to subterete, 1.5–2.5 × 1–1.5 mm; nectary disc elevated 0.1–0.2 mm on ovary apex, yellowish green, 0.7–0.9 mm diam., 4-lobed, glabrous; style yellowish green, 0.3–0.5 mm, glabrous, stigma pale yellow, capitate, 0.2–0.3 × 0.2–0.3 mm, not exserted beyond anthers. <b>Capsules</b> oblong-obovoid, subterete, 2.5–4(–4.5) × 1.5–2.5 mm, thin-walled, seeds often visible on exocarp as small bumps, irregularly dehiscent or dispersing as unit, pedicel 0–0.5 mm. <b>Seeds</b> dark reddish brown, ellipsoid, 0.5–0.7 × 0.4–0.5 mm, surface cells transversely elongate. <b>2n</b> = 32.</span><!--

-->{{Treatment/Body
|discussion=<p>Flowers May–Sep. Ditches, swales, edges of ponds, lakes, sinks, swamps, sandy river bars, dried seasonal ponds, disturbed low savannas; of conservation concern; 0–200 m; Ala., Fla., Ga., S.C.</p><!--
--><p>The tetraploid Ludwigia spathulata is relatively uncommon and occurs primarily on the Gulf Coastal Plain in the panhandle of Florida, southern Alabama, and southwestern Georgia. Outlying populations have also been collected in transitional areas between the Coastal Plain and the Piedmont in South Carolina and Georgia. With its small apetalous flowers, L. spathulata is modally autogamous and shows low morphological variability. Its strongest affinities appear to be with L. palustris, with which it shares a genome (C. I. Peng 1988, 1989).</p>
|tables=
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-->{{#Taxon:
name=Ludwigia spathulata
|authority=Torrey & A. Gray
|rank=species
|parent rank=section
|synonyms=Isnardia spathulata
|basionyms=
|family=Onagraceae
|reference=None
|publication title=Fl. N. Amer.
|publication year=1840
|special status=
|source xml=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/e39f0e846f172941159b2045254d62d10d9823f6/coarse_grained_fna_xml/V10/V10_256.xml
|subfamily=Onagraceae subfam. Ludwigioideae
|genus=Ludwigia
|section=Ludwigia sect. Isnardia
|species=Ludwigia spathulata
}}<!--

-->[[Category:Treatment]][[Category:Ludwigia sect. Isnardia]]