View source for Heterosperma

{{Treatment/ID
|accepted_name=Heterosperma
|accepted_authority=Cavanilles
|publications={{Treatment/Publication
|title=Icon.
|place=3: 34. 1795
|year=1795
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Coreopsidinae;Heterosperma
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Coreopsidinae]]</div><div class="higher-taxon"><small>genus</small>[[Heterosperma]]</div></div>
|etymology=Greek, heteros, differing, and sperma, seed; probably alluding to the contrasting outer and inner cypselae
|volume=Volume 21
|mention_page=page 184
|treatment_page=page 218
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism atypical some measurement;whole-organism some measurement;whole-organism duration"><b>Annuals,</b> 10–40 (–70+) cm (taprooted).</span> <span class="statement" id="st-d0_s1" data-properties="stem quantity;stem orientation;stem architecture"><b>Stems </b>1 (bases relatively thick), ascending to erect, branched distally or ± throughout (striate).</span> <span class="statement" id="st-d0_s2" data-properties="leaf position"><b>Leaves </b>mostly cauline;</span> <span class="statement" id="st-d0_s3" data-properties="">opposite;</span> <span class="statement" id="st-d0_s4" data-properties="leaf arrangement;leaf architecture;leaf architecture">obscurely petiolate or sessile;</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;ultimate margin architecture or shape;ultimate margin shape;face pubescence">blades mostly pinnately lobed [undivided] (lobes 3–5, usually linear to filiform, sometimes lanceolate), ultimate margins usually entire, sometimes denticulate (often ciliate, at least proximally, apices acute), faces glabrous [hairy].</span> <span class="statement" id="st-d0_s6" data-properties="head architecture or arrangement;head arrangement;head arrangement;array architecture or fragility;array architecture"><b>Heads </b>radiate, borne singly or in loose, cymiform arrays.</span> <span class="statement" id="st-d0_s7" data-properties="bractlet atypical quantity;bractlet quantity;bractlet orientation;bractlet shape;bractlet growth form or texture"><b>Calyculi </b>of (1–) 3–5+ erect, narrowly spatulate or linear to filiform, herbaceous bractlets (often surpassing phyllaries, margins usually hispid-ciliate).</span> <span class="statement" id="st-d0_s8" data-properties=""><b>Involucres </b>cylindric to obconic, 2–5 mm diam.</span> <span class="statement" id="st-d0_s9" data-properties="involucre shape;involucre diameter">(larger in fruit).</span> <span class="statement" id="st-d0_s10" data-properties="phyllary quantity;phyllary fusion;phyllary orientation;phyllary shape;phyllary shape;phyllary variability;phyllary texture;series quantity"><b>Phyllaries </b>3–5+ in ± 2 series, distinct, erect, mostly oblong or ovate, equal, membranous.</span> <span class="statement" id="st-d0_s11" data-properties="receptacle shape;receptacle architecture"><b>Receptacles </b>concave to flat, paleate;</span> <span class="statement" id="st-d0_s12" data-properties="palea shape">paleae similar to phyllaries, oblong or oval to lanceolate or linear (± embracing cypselae, ± hyaline with brown striae, apices obtuse, apiculate).</span> <span class="statement" id="st-d0_s13" data-properties="ray-floret atypical quantity;ray-floret quantity;ray-floret architecture;ray-floret reproduction"><b>Ray-</b>florets 1–3 [–8], pistillate, fertile;</span> <span class="statement" id="st-d0_s14" data-properties="corolla coloration">corollas pale-yellow [orange].</span> <span class="statement" id="st-d0_s15" data-properties="disc-floret atypical quantity;disc-floret quantity;disc-floret reproduction;disc-floret reproduction"><b>Disc-</b>florets 3–10 [–20+], bisexual, fertile;</span> <span class="statement" id="st-d0_s16" data-properties="corolla coloration;tube height or length or size;lobe quantity;lobe shape">corollas ± yellow (at least distally), tubes shorter than funnelform throats, lobes 5, deltate.</span> <span class="statement" id="st-d0_s17" data-properties="cypsela position;cypsela shape;cypsela shape;cypsela shape;cypsela architecture;face relief;face pubescence;face position;face shape;face shape;beak architecture"><b>Cypselae </b>(± dimorphic) outer obcompressed, ellipsoid or obovoid, winged (wings ± corky, often cucullate and/or pectinate), faces often corky-tuberculate, glabrous, inner ± obovoid, usually some (innermost) tapered to ± barbellate beaks;</span> <span class="statement" id="st-d0_s18" data-properties="awn atypical quantity;awn quantity;awn orientation;awn architecture">pappi 0, or persistent or tardily falling, of (1–) 2–3 spreading to reflexed, retrorsely barbellate awns.</span> <span class="statement" id="st-d0_s19" data-properties="pappus presence;pappus duration;pappus life cycle;x chromosome quantity">x = 25.</span><!--

-->{{Treatment/Body
|distribution=sw United States;Mexico;Central America;South America;in West Indies
|discussion=<p>Species 5–10 (1 in the flora).</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Heterosperma
|author=Justin W. Allison
|authority=Cavanilles
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Linny Heagy
|illustration copyright=Flora of North America Association
|distribution=sw United States;Mexico;Central America;South America;in West Indies
|reference=None
|publication title=Icon.
|publication year=1795
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21_531.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae
|genus=Heterosperma
|array architecture=cymiform
|array architecture or fragility=loose
|awn architecture=barbellate
|awn atypical quantity=1;2
|awn orientation=spreading;reflexed
|awn quantity=2;3
|beak architecture=barbellate
|blade shape=lobed
|bractlet atypical quantity=1;3
|bractlet growth form or texture=herbaceous
|bractlet orientation=erect
|bractlet quantity=3;5
|bractlet shape=linear;filiform
|corolla coloration=yellow;pale-yellow
|cypsela architecture=winged
|cypsela position=outer
|cypsela shape=obovoid;ellipsoid;obcompressed
|disc-floret atypical quantity=10;20
|disc-floret quantity=3;10
|disc-floret reproduction=fertile;bisexual
|face position=inner
|face pubescence=glabrous;glabrous
|face relief=corky-tuberculate
|face shape=tapered;obovoid
|head architecture or arrangement=radiate
|head arrangement=in loose , cymiform arrays;singly
|involucre diameter=2mm;5mm
|involucre shape=cylindric;obconic
|leaf architecture=sessile;petiolate
|leaf arrangement=opposite
|leaf position=cauline
|lobe quantity=5
|lobe shape=deltate
|palea shape=oval;lanceolate or linear
|pappus duration=persistent
|pappus life cycle=falling
|pappus presence=absent
|phyllary fusion=distinct
|phyllary orientation=erect
|phyllary quantity=3;5
|phyllary shape=ovate;oblong
|phyllary texture=membranous
|phyllary variability=equal
|ray-floret architecture=pistillate
|ray-floret atypical quantity=3;8
|ray-floret quantity=1;3
|ray-floret reproduction=fertile
|receptacle architecture=paleate
|receptacle shape=concave;flat
|series quantity=2
|stem architecture=branched
|stem orientation=ascending;erect
|stem quantity=1
|tube height or length or size=shorter
|ultimate margin architecture or shape=entire
|ultimate margin shape=denticulate
|whole-organism atypical some measurement=40cm;70cm
|whole-organism duration=annual
|whole-organism some measurement=10cm;40cm
|x chromosome quantity=25
}}<!--

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