View source for Peniocereus greggii

{{Treatment/ID
|accepted_name=Peniocereus greggii
|accepted_authority=(Engelmann) Britton & Rose
|publications={{Treatment/Publication
|title=Contr. U.S. Natl. Herb.
|place=12: 428. 1909
|year=1909
}}
|common_names=Desert night-blooming cereus;Arizona queen-of-the-night
|basionyms={{Treatment/ID/Synonym
|name=Cereus greggii
|authority=Engelmann
}}
|synonyms=
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Peniocereus;Peniocereus greggii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cactaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Cactaceae subfam. Cactoideae]]</div><div class="higher-taxon"><small>genus</small>[[Peniocereus]]</div><div class="higher-taxon"><small>species</small>[[Peniocereus greggii]]</div></div>
|volume=Volume 4
|mention_page=page 157
|treatment_page=page 156
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="shrub orientation;shrub orientation;shrub orientation;shrub prominence"><b>Shrubs,</b> erect to sprawling, usually inconspicuous.</span> <span class="statement" id="st-d0_s1" data-properties="root shape;root length;root width"><b>Roots </b>turnip-shaped, usually 15–30 × 5–12 cm (much larger ones known).</span> <span class="statement" id="st-d0_s2" data-properties="stem coloration;stem coloration;stem coloration;stem architecture;stem architecture;stem atypical some measurement;stem some measurement;stem diameter;stem shape;branch count;midlength diameter"><b>Stems </b>gray-green to gray, simple or with 2–5 branches, 40–120 (–300) cm, distally 8–20 mm diam., at midlength ca. 10 mm diam., often narrowed toward base;</span> <span class="statement" id="st-d0_s3" data-properties="wood architecture;wood architecture;wood shape;wood diameter">wood hollow, solid-surfaced cylinders, 4–7 mm diam.;</span> <span class="statement" id="st-d0_s4" data-properties="rib count;rib prominence">ribs 4–6, prominent;</span> <span class="statement" id="st-d0_s5" data-properties="areole atypical some measurement;areole atypical some measurement;areole some measurement;areole arrangement;areole arrangement or shape;areole arrangement or shape;areole arrangement or shape;areole length;areole width">areoles (3.5–) 12 (–15) mm apart along ribs, circular to elliptic, 2–5 × 2 mm.</span> <span class="statement" id="st-d0_s6" data-properties="spine atypical count;spine atypical count;spine count;row count;row orientation"><b>Spines </b>(9–) 11–15 (–17) per areole, usually in 3 vertical rows;</span> <span class="statement" id="st-d0_s7" data-properties="abaxial spine count;spine fixation or orientation;spine coloration;spine some measurement;spine pubescence">abaxial 3–5 spines appressed, yellowish white throughout or only at tips, to 3 mm, puberulent when young;</span> <span class="statement" id="st-d0_s8" data-properties="adaxial spine coloration;adaxial spine shape;adaxial spine some measurement">adaxial spines black, subulate, to 1 mm.</span> <span class="statement" id="st-d0_s9" data-properties="flower duration;flower some measurement"><b>Flowers:</b> nocturnal (remaining open next day), 15–25 cm;</span> <span class="statement" id="st-d0_s10" data-properties="scale coloration;scale coloration;scale coloration">scales of flower tubes green, tipped red or brown;</span> <span class="statement" id="st-d0_s11" data-properties="outer tepal coloration;midstripe coloration;midstripe coloration;midstripe coloration">outer tepals greenish white with brown to reddish midstripes;</span> <span class="statement" id="st-d0_s12" data-properties="inner tepal coloration;inner tepal coloration;inner tepal coloration;inner tepal shape;inner tepal architecture or shape;inner tepal some measurement;inner tepal shape;inner tepal shape;inner tepal shape">inner tepals white or lightly tinged cream or pink (or rarely all rose-pink), lanceolate-attenuate, apiculate, 4–7 cm, attenuate to mucronate;</span> <span class="statement" id="st-d0_s13" data-properties="stamen some measurement">stamens 2.5 cm;</span> <span class="statement" id="st-d0_s14" data-properties="anther coloration;anther some measurement">anthers cream-yellow, 2 mm;</span> <span class="statement" id="st-d0_s15" data-properties="style coloration;style some measurement">style white, 10–14 cm;</span> <span class="statement" id="st-d0_s16" data-properties="stigma lobe count;stigma lobe coloration">stigma lobes 9–11, white.</span> <span class="statement" id="st-d0_s17" data-properties="fruit coloration;fruit coloration;fruit shape;fruit length;fruit width"><b>Fruits </b>bright red, darkening in age, ellipsoid, 60–90 × 40–50 mm.</span> <span class="statement" id="st-d0_s18" data-properties="seed length;seed width;2n chromosome count"><b>Seeds </b>3–4 × 2–2.5 mm. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|distribution=sw United States;w Mexico.
|discussion=<p>Varieties 2 (2 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
|Areoles elliptic, 4-5 × 2 mm; adaxial spines tending to be directed toward tip of plant; abaxial spines directed toward base of plant; flowers 15-17 × 5-6 cm
|[[Peniocereus greggii var. greggii|Peniocereus greggii var. greggii]]
|-id=key-0-1
|1
|Areoles nearly circular, 2 × 2 mm; spines radially spreading; flowers 22-25 × 7-8 cm
|[[Peniocereus greggii var. transmontanus|Peniocereus greggii var. transmontanus]]
|}
</div></div><!--

-->{{#Taxon:
name=Peniocereus greggii
|author=
|authority=(Engelmann) Britton & Rose
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Cereus greggii
|family=Cactaceae
|distribution=sw United States;w Mexico.
|reference=None
|publication title=Contr. U.S. Natl. Herb.
|publication year=1909
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V4/V4_301.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Peniocereus
|species=Peniocereus greggii
|2n chromosome count=22
|abaxial spine count=3;5
|adaxial spine coloration=black
|adaxial spine shape=subulate
|adaxial spine some measurement=0mm;1mm
|anther coloration=cream-yellow
|anther some measurement=2
|areole arrangement=apart
|areole arrangement or shape=circular;elliptic
|areole atypical some measurement=12mm;15mm
|areole length=2mm;5mm
|areole some measurement=12
|areole width=2
|branch count=2;5
|flower duration=nocturnal
|flower some measurement=15cm;25cm
|fruit coloration=darkening;bright red
|fruit length=60mm;90mm
|fruit shape=ellipsoid
|fruit width=40mm;50mm
|inner tepal architecture or shape=apiculate
|inner tepal coloration=pink;tinged cream;white
|inner tepal shape=attenuate;mucronate
|inner tepal some measurement=4cm;7cm
|midlength diameter=10
|midstripe coloration=brown;reddish
|outer tepal coloration=greenish white
|rib count=4;6
|rib prominence=prominent
|root length=15cm;30cm
|root shape=turnip-shaped
|root width=5cm;12cm
|row count=3
|row orientation=vertical
|scale coloration=brown;tipped red;green
|seed length=3mm;4mm
|seed width=2mm;2.5mm
|shrub orientation=erect;sprawling
|shrub prominence=inconspicuous
|spine atypical count=15;17
|spine coloration=yellowish white
|spine count=11;15
|spine fixation or orientation=appressed
|spine pubescence=puberulent
|spine some measurement=0mm;3mm
|stamen some measurement=2.5
|stem architecture=with 2-5 branches;simple
|stem atypical some measurement=120cm;300cm
|stem coloration=gray-green;gray
|stem diameter=8mm;20mm
|stem shape=narrowed
|stem some measurement=40cm;120cm
|stigma lobe coloration=white
|stigma lobe count=9;11
|style coloration=white
|style some measurement=10cm;14cm
|wood architecture=solid-surfaced;hollow
|wood diameter=4mm;7mm
|wood shape=cylinders
}}<!--

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