View source for Oenothera subsect. Calylophus

{{Treatment/ID
|accepted_name=Oenothera subsect. Calylophus
|accepted_authority=(Spach) W. L. Wagner & Hoch
|publications={{Treatment/Publication
|title=Syst. Bot. Monogr.
|place=83: 147. 2007
|year=2007
}}
|basionyms={{Treatment/ID/Basionym
|name=Calylophus spach
|authority=
|rank=species
|publication_title=Hist. Nat. Vég.
|publication_place=4: 349.  1835
}}
|synonyms=
|hierarchy=Onagraceae;Onagraceae subfam. Onagroideae;Onagraceae tribe Onagreae;Oenothera;Oenothera sect. Calylophus;Oenothera subsect. Calylophus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Onagraceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Onagraceae subfam. Onagroideae]]</div><div class="higher-taxon"><small>tribe</small>[[Onagraceae tribe Onagreae]]</div><div class="higher-taxon"><small>genus</small>[[Oenothera]]</div><div class="higher-taxon"><small>section</small>[[Oenothera sect. Calylophus]]</div><div class="higher-taxon"><small>subsection</small>[[Oenothera subsect. Calylophus]]</div></div>
|volume=Volume 10
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="herb duration;herb duration;herb growth form;herb duration"><b>Herbs </b>perennial, short-lived or suffrutescent, or annual.</span> <span class="statement" id="st-d0_s1" data-properties="blade margin shape;blade margin shape"><b>Leaves:</b> blade margins subentire or serrulate or spinulose-serrate.</span> <span class="statement" id="st-d0_s2" data-properties="flower arrangement"><b>Flowers </b>usually crowded near stem apex;</span> <span class="statement" id="st-d0_s3" data-properties="bud shape">buds quadrangular;</span> <span class="statement" id="st-d0_s4" data-properties="floral-tube some measurement">floral-tube 2–20 mm;</span> <span class="statement" id="st-d0_s5" data-properties="midrib shape">sepals with keeled midrib;</span> <span class="statement" id="st-d0_s6" data-properties="series quantity;series size;antisepalous set length or size;pollen reproduction">stamens in 2 unequal series, antisepalous set conspicuously longer, pollen 30–100% fertile.</span> <span class="statement" id="st-d0_s7" data-properties="capsule texture;capsule course;capsule course;capsule orientation;capsule dehiscence;capsule length"><b>Capsules </b>hard, straight or, sometimes, slightly recurved, tardily dehiscent 1/2 to throughout their length.</span> <span class="statement" id="st-d0_s8" data-properties=""><b>Seeds </b>obovoid or oblanceoloid, sometimes sharply angled.</span> <span class="statement" id="st-d0_s9" data-properties="seed shape;seed shape;seed shape;2n chromosome quantity">2n = 14.</span><!--

-->{{Treatment/Body
|distribution=w;c North America;n Mexico
|discussion=<p>Species 3 (3 in the flora).</p><!--
--><p>Subsection Calylophus consists of three species (four taxa), one of which (Oenothera capillifolia) occurs primarily in Texas, but extends to southeastern Colorado, southern Kansas, southern Louisiana, and northeastern Mexico, and is disjunct in northwestern New Mexico; O. serrulata occurs throughout the Great Plains to Alberta, Manitoba, and Saskatchewan east to Wisconsin, west to east-central Arizona, with one occurrence in Chihuahua, Mexico, at elevations 0–1800(–2100) m. Species of subsect. Calylophus have diurnal flowers.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Petals 5–12(–20) mm; stigmas surrounded by anthers at anthesis; pollen 30–60(–80)% fertile.
|[[Oenothera serrulata|Oenothera serrulata]]
|-id=key-0-1
|1
|Petals 6–25 mm; stigmas exserted beyond anthers at anthesis; pollen 90–100% fertile.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Leaves (0.1–)0.3–1 cm wide; stems (10–)25–80 cm, 1–many, unbranched to moderately branched, weakly decumbent to erect; sepals 4–12 mm; floral tube 5–20 mm; petals 6–25 mm.
|[[Oenothera capillifolia|Oenothera capillifolia]]
|-id=key-0-2
|2
|Leaves 0.1–0.2 cm wide; stems 15–30(–40) cm, many, branched from base, ascending to erect; sepals 4–6 mm; floral tube 7 mm; petals 15–20 mm.
|[[Oenothera gayleana|Oenothera gayleana]]
|}
</div></div><!--

-->{{#Taxon:
name=Oenothera subsect. Calylophus
|authority=(Spach) W. L. Wagner & Hoch
|rank=subsection
|parent rank=section
|synonyms=
|basionyms=Calylophus spach
|family=Onagraceae
|distribution=w;c North America;n Mexico
|reference=None
|publication title=Syst. Bot. Monogr.
|publication year=2007
|special status=
|source xml=
|subfamily=Onagraceae subfam. Onagroideae
|tribe=Onagraceae tribe Onagreae
|genus=Oenothera
|section=Oenothera sect. Calylophus
|subsection=Oenothera subsect. Calylophus
|2n chromosome quantity=14
|antisepalous set length or size=longer
|blade margin shape=serrulate or spinulose-serrate;subentire
|bud shape=quadrangular
|capsule course=,;straight
|capsule dehiscence=dehiscent
|capsule length=1/2
|capsule orientation=recurved
|capsule texture=hard
|floral-tube some measurement=2mm;20mm
|flower arrangement=crowded
|herb duration=annual;short-lived;perennial
|herb growth form=suffrutescent
|midrib shape=keeled
|pollen reproduction=fertile
|seed shape=angled;oblanceoloid;obovoid
|series quantity=2
|series size=unequal
}}<!--

-->[[Category:Treatment]][[Category:Oenothera sect. Calylophus]]