View source for Najas guadalupensis

{{Treatment/ID
|accepted_name=Najas guadalupensis
|accepted_authority=(Sprengel) Magnus
|publications={{Treatment/Publication
|title=Beitrage zur Kenntniss der Gattung Najas
|place=8. 1870
|year=1870
}}
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}
|basionyms={{Treatment/ID/Basionym
|name=Caulinia guadalupensis
|authority=Sprengel
|rank=species
|publication_title=Syst. Veg.
|publication_place=1: 20. 1824
}}
|synonyms=
|hierarchy=Najadaceae;Najas;Najas guadalupensis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Najadaceae]]</div><div class="higher-taxon"><small>genus</small>[[Najas]]</div><div class="higher-taxon"><small>species</small>[[Najas guadalupensis]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>often profusely branched distally, 11–90 cm × 0.1–2 mm; internodes 0.1–9 cm, without prickles. <b>Leaves</b> spreading with age, 0.3–3.3 cm, lax in age; sheath 1–3.4 mm wide, apex rounded to truncate; blade 0.2–2.1 mm wide, margins minutely serrulate, teeth 18–100 per side, apex rounded to truncateslightly auriculate, with 1–3 teeth, teeth unicellular; midvein without prickles abaxially. <b>Flowers</b> 1–3 per axil, staminate and pistillate on same plants. <b>Staminate</b> flowers in distal axils, 1.5–3 mm; involucral beaks 4-lobed, 0.2–1.3 mm; anther 1- or 4-loculed, 1–1.7 mm. <b>Pistillate</b> flowers in proximal axils, 1.5–4 mm; styles 0.3–1.5 mm; stigmas 4-lobed. <b>Seeds</b> not recurved, yellowish white with purple tinge, fusiform, 1.2–3.8 × 0.4–0.8 mm, apex with style situated at center; testa dull, 3 cell layers thick, pitted; aeroleareoles regularly arranged in 20–60 longitudinal rows, not ladderlike, 4–6-angled, longer than broad, end walls not raised. <b>2n</b> = 12, 36, 42, 48, 54, 60.</span><!--

-->{{Treatment/Body
|distribution=Alta.;Man.;Ont.;Que.;Ala.;Ariz.;Ark.;Calif.;Colo.;Conn.;D.C.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Mass.;Md.;Mich.;Minn.;Miss.;Mo.;Mont.;N.C.;N.H.;N.J.;N.Y.;Nebr.;Nev.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Va.;Vt.;W.Va.;Wash.;Wis.;Widespread.
|discussion=<p>By having unicellular teeth on the leaf margin, <i>Najas guadalupensis</i> resembles <i>N. flexilis</i> and <i>N. graminea</i>. The seeds of <i>N. guadalupensis</i> are pitted; those of <i>N. flexilis</i> are smooth. The sheaths of <i>N. guadalupensis</i> are rounded to slightly auriculate; those of <i>N. graminea</i> are deeply auriculate.</p><!--
--><p>Subspecies 4 (4 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Seeds 3.3–3.8 mm; aeroleareoles of testa arranged in 50–60 longitudinal rows
|[[Najas guadalupensis subsp. muenscheri|Najas guadalupensis subsp. muenscheri]]
|-id=key-0-1
|1
|Seeds 2.5 mm or less; aeroleareoles of testa in fewer than 50 longitudinal rows.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Teeth of leaf blade evident to unaided eye; anthers 1-loculed
|[[Najas guadalupensis subsp. floridana|Najas guadalupensis subsp. floridana]]
|-id=key-0-2
|2
|Teeth of leaf blade invisible to unaided eye; anthers 4-loculed.
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Leaf blade with 50–100 teeth per side; stems 0.8 mm or less diam.
|[[Najas guadalupensis subsp. guadalupensis|Najas guadalupensis subsp. guadalupensis]]
|-id=key-0-3
|3
|Leaf blade with 20–40 teeth per side; stem 1 mm or more diam.
|[[Najas guadalupensis subsp. olivacea|Najas guadalupensis subsp. olivacea]]
|}
</div></div><!--

-->{{#Taxon:
name=Najas guadalupensis
|authority=(Sprengel) Magnus
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Caulinia guadalupensis
|family=Najadaceae
|distribution=Alta.;Man.;Ont.;Que.;Ala.;Ariz.;Ark.;Calif.;Colo.;Conn.;D.C.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Mass.;Md.;Mich.;Minn.;Miss.;Mo.;Mont.;N.C.;N.H.;N.J.;N.Y.;Nebr.;Nev.;Ohio;Okla.;Oreg.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Tex.;Utah;Va.;Vt.;W.Va.;Wash.;Wis.;Widespread.
|reference=None
|publication title=Beitrage zur Kenntniss der Gattung Najas
|publication year=1870
|special status=Weedy
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V22/V22_337.xml
|genus=Najas
|species=Najas guadalupensis
}}<!--

-->[[Category:Treatment]][[Category:Najas]]