View source for Euphorbia vallis-mortae

{{Treatment/ID
|accepted_name=Euphorbia vallis-mortae
|accepted_authority=(Millspaugh) J. T. Howell
|publications={{Treatment/Publication
|title=Madroño
|place=2: 19. 1931
|year=1931
}}
|common_names=Death Valley sandmat
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Chamaesyce vallis-mortae
|authority=Millspaugh
|rank=species
|publication_title=Publ. Field Mus. Nat. Hist., Bot. Ser.
|publication_place=2: 403. 1916
}}
|synonyms=
|hierarchy=Euphorbiaceae;Euphorbia;Euphorbia sect. Anisophyllum;Euphorbia vallis-mortae
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Euphorbiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Euphorbia]]</div><div class="higher-taxon"><small>section</small>[[Euphorbia sect. Anisophyllum]]</div><div class="higher-taxon"><small>species</small>[[Euphorbia vallis-mortae]]</div></div>
|volume=Volume 12
|mention_page=page 254, 292
|treatment_page=page 291
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism duration;whole_organism growth form;taproot size or width;taproot texture"><b>Herbs,</b> perennial, with thickened, woody taproot.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem growth form;stem some measurement;stem pubescence"><b>Stems </b>prostrate to ascending, often mat-forming, 10–45 cm, pilose to villous.</span> <span class="statement" id="st-d0_s2" data-properties="leaf arrangement"><b>Leaves </b>opposite;</span> <span class="statement" id="st-d0_s3" data-properties="stipule fusion;stipule fusion;stipule shape;stipule some measurement;stipule pubescence">stipules distinct or connate, subulate to filiform, 0.4–1.1 mm, densely tomentose;</span> <span class="statement" id="st-d0_s4" data-properties="petiole some measurement;petiole pubescence">petiole 0.4–1 mm, pilose to villous;</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade length;blade width;base architecture or shape;base shape;margin architecture or shape;apex shape">blade suborbiculate to oblong-ovate, 3–8 × 2–6 mm, base slightly asymmetric, rounded, margins entire, apex rounded to obtuse, surfaces pilose to villous;</span> <span class="statement" id="st-d0_s6" data-properties="surface pubescence;surface architecture;midvein prominence;midvein pubescence">3-veined at base, midvein conspicuous, venation often obscured by pubescence.</span> <span class="statement" id="st-d0_s7" data-properties="cyathium architecture or arrangement or growth form"><b>Cyathia </b>solitary at distal nodes;</span> <span class="statement" id="st-d0_s8" data-properties="peduncle some measurement">peduncle 0.5–1.8 mm.</span> <span class="statement" id="st-d0_s9" data-properties="involucre shape;involucre length;involucre width;involucre pubescence"><b>Involucre </b>obconic-campanulate, 1.2–2.3 × 1–1.8 mm, densely pilose to villous;</span> <span class="statement" id="st-d0_s10" data-properties="gland quantity;gland coloration;gland shape;gland length;gland width">glands 4, yellow to red, subcircular to oblong, 0.2–0.5 × 0.4–0.9 mm;</span> <span class="statement" id="st-d0_s11" data-properties="appendage coloration;appendage shape;appendage length;appendage width;distal margin shape;distal margin shape;adaxial surface pubescence">appendages white, flabellate to oblong, 0.1–0.7 × 0.5–1.9 mm, distal margin entire or crenulate, adaxial surface ciliate-puberulent.</span> <span class="statement" id="st-d0_s12" data-properties="flower architecture;flower atypical quantity;flower quantity"><b>Staminate </b>flowers 15–22 (–50).</span> <span class="statement" id="st-d0_s13" data-properties="flower architecture;ovary pubescence"><b>Pistillate </b>flowers: ovary densely pilose;</span> <span class="statement" id="st-d0_s14" data-properties="flower architecture;style some measurement;style shape;style length">styles 0.4–0.8 mm, 2-fid 1/2 length.</span> <span class="statement" id="st-d0_s15" data-properties="capsule shape;capsule length;capsule width;capsule pubescence"><b>Capsules </b>ovoid, 1.5–2.2 × 1.8–2.2 mm, tomentose;</span> <span class="statement" id="st-d0_s16" data-properties="columella some measurement">columella 1.2–1.6 mm.</span> <span class="statement" id="st-d0_s17" data-properties="seed coloration;seed coloration;seed coloration;seed coloration;seed coloration;seed shape;seed shape;abaxial face shape;adaxial face shape;adaxial face length;adaxial face width;adaxial face architecture or pubescence or relief"><b>Seeds </b>white, gray, or light-brown, ovoid, sharply 4-angled in cross-section, abaxial faces slightly convex, adaxial faces concave, 1.2–1.7 × 0.6–0.9 mm, smooth.</span><!--

-->{{Treatment/Body
|phenology=Flowering and fruiting late spring–fall.
|habitat=Roadsides, desert scrub, streamsides, sandy washes.
|elevation=700–2000 m.
|distribution=Calif.
|discussion=<p>The specific epithet of Euphorbia vallis-mortae is a misnomer because the species does not occur in Death Valley; instead, it is found at the transition of the northern edge of the Mojave Desert and the foothills of the southern Sierra Nevada in Inyo, Kern, and San Bernardino counties.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Euphorbia vallis-mortae
|authority=(Millspaugh) J. T. Howell
|rank=species
|parent rank=section
|synonyms=
|basionyms=Chamaesyce vallis-mortae
|family=Euphorbiaceae
|phenology=Flowering and fruiting late spring–fall.
|habitat=Roadsides, desert scrub, streamsides, sandy washes.
|elevation=700–2000 m.
|distribution=Calif.
|reference=None
|publication title=Madroño
|publication year=1931
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V12/V12_678.xml
|genus=Euphorbia
|section=Euphorbia sect. Anisophyllum
|species=Euphorbia vallis-mortae
|abaxial face shape=convex
|adaxial face architecture or pubescence or relief=smooth
|adaxial face length=1.2mm;1.7mm
|adaxial face shape=concave
|adaxial face width=0.6mm;0.9mm
|adaxial surface pubescence=ciliate-puberulent
|apex shape=rounded;obtuse
|appendage coloration=white
|appendage length=0.1mm;0.7mm
|appendage shape=flabellate;oblong
|appendage width=0.5mm;1.9mm
|base architecture or shape=asymmetric
|base shape=rounded
|blade length=3mm;8mm
|blade shape=suborbiculate;oblong-ovate
|blade width=2mm;6mm
|capsule length=1.5mm;2.2mm
|capsule pubescence=tomentose
|capsule shape=ovoid
|capsule width=1.8mm;2.2mm
|columella some measurement=1.2mm;1.6mm
|cyathium architecture or arrangement or growth form=solitary
|distal margin shape=crenulate;entire
|flower architecture=pistillate;pistillate;staminate
|flower atypical quantity=22;50
|flower quantity=15;22
|gland coloration=yellow;red
|gland length=0.2mm;0.5mm
|gland quantity=4
|gland shape=subcircular;oblong
|gland width=0.4mm;0.9mm
|involucre length=1.2mm;2.3mm
|involucre pubescence=densely pilose;villous
|involucre shape=obconic-campanulate
|involucre width=1mm;1.8mm
|leaf arrangement=opposite
|margin architecture or shape=entire
|midvein prominence=conspicuous
|midvein pubescence=obscured
|ovary pubescence=pilose
|peduncle some measurement=0.5mm;1.8mm
|petiole pubescence=pilose;villous
|petiole some measurement=0.4mm;1mm
|seed coloration=light-brown;gray;light-brown;gray;white
|seed shape=4-angled;ovoid
|stem growth form=mat-forming
|stem orientation=prostrate;ascending
|stem pubescence=pilose;villous
|stem some measurement=10cm;45cm
|stipule fusion=connate;distinct
|stipule pubescence=tomentose
|stipule shape=subulate;filiform
|stipule some measurement=0.4mm;1.1mm
|style length=1/2
|style shape=2-fid
|style some measurement=0.4mm;0.8mm
|surface architecture=3-veined
|surface pubescence=pilose;villous
|taproot size or width=thickened
|taproot texture=woody
|whole_organism duration=perennial
|whole_organism growth form=herb
}}<!--

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