View source for Cyperus lupulinus

{{Treatment/ID
|accepted_name=Cyperus lupulinus
|accepted_authority=(Sprengel) Marcks
|publications={{Treatment/Publication
|title=Trans. Wisconsin Acad. Sci.
|place=62: 271. 1974
|year=1974
}}
|basionyms={{Treatment/ID/Basionym
|name=Scirpus lupulinus
|authority=Sprengel
|rank=species
|publication_title=Mant. Prim. Fl. Hal.,
|publication_place=30. 1807
}}
|synonyms=
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Cyperus;Cyperus lupulinus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Cyperus]]</div><div class="higher-taxon"><small>subgenus</small>[[Cyperus subg. Cyperus]]</div><div class="higher-taxon"><small>species</small>[[Cyperus lupulinus]]</div></div>
|volume=Volume 23
|mention_page=page 144, 147, 175
|treatment_page=page 176
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, cespitose, bases cormose; rhizomes knotted, beaded. <b>Culms</b> trigonous, (3–)10–50 cm × 0.4–1.2 mm, glabrous. <b>Leaves</b> flat, 5–40 cm × 1–3.5 mm. <b>Inflorescences</b>: spikes rather densely ovoid to globose, 1.2–3.5 cm; rays 0 or 1–4, 1–6 cm; rachis 1–3.5 mm; bracts 2–4, horizontal to reflexed, flat, 6–25 cm; rachilla ± deciduous, wingless. <b>Spikelets</b> 15–60, compressed, oblong-lanceoloid, (3–)6–22 × 2.5–4 mm; floral scales deciduous, 5–22, off-white to light reddish brown, laterally 3–5-ribbed, ovate-elliptic, 2.5–4 × 2–2.6 mm, margins loosely spreading or clasping achene, apex entire to mucronate, mucro 0.05–0.2 mm. <b>Flowers</b>: anthers 0.3–0.6 mm; styles 1 mm; stigmas 1–1.5 mm. <b>Achenes</b> dark brown or black, sessile, oblong-ellipsoid to ellipsoid, 1.7–2.2 × 0.8–1.2 mm, apex obtuse, apiculate, surfaces puncticulate. <b>2n</b> = 166.</span><!--

-->{{Treatment/Body
|distribution=North America.
|discussion=<p>Subspecies 2 (2 in the flora).</p><!--
--><p><i>Cyperus lupulinus</i> was studied in detail (B. G. Marcks 1974). Ranges of the two subspecies overlap somewhat. <i>Cyperus lupulinus</i> subsp. lupulinus is found chiefly in the Great Plains, and subsp. macilentus is centered in the Northeast. It is seldom difficult to assign specimens to subspecies.</p><!--
--><p>The hybrid of <i>Cyperus lupulinus</i> with <i>C. schweinitzii</i> is C. ×mesochorus Geise. It is occasionally encountered with the two parent species in the north-central states (Illinois, Indiana, Michigan, Minnesota, and Wisconsin) and has been recorded once from Quebec. The hybrid is similar in size to <i>C. schweinitzii</i>; it has fewer rays, inflorescence bracts 30–45º above horizontal, and floral scales with mucros 0.4–0.5 mm.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Floral scales 2.5–4 mm, margins not clasping achene; spikelets with 5–22 floral scales.
|[[Cyperus lupulinus subsp. lupulinus|Cyperus lupulinus subsp. lupulinus]]
|-id=key-0-1
|1
|Floral scales 1.8–2.5 mm, margins tightly clasping achene; spikelets with 3–7 floral scales.
|[[Cyperus lupulinus subsp. macilentus|Cyperus lupulinus subsp. macilentus]]
|}
</div></div><!--

-->{{#Taxon:
name=Cyperus lupulinus
|authority=(Sprengel) Marcks
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=Scirpus lupulinus
|family=Cyperaceae
|distribution=North America.
|reference=None
|publication title=Trans. Wisconsin Acad. Sci.
|publication year=1974
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_295.xml
|genus=Cyperus
|subgenus=Cyperus subg. Cyperus
|species=Cyperus lupulinus
}}<!--

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