View source for Hymenothrix

{{Treatment/ID
|accepted_name=Hymenothrix
|accepted_authority=A. Gray
|publications={{Treatment/Publication
|title=Mem. Amer. Acad. Arts, n. s.
|place=4: 102. 1849
|year=1849
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Chaenactidinae;Hymenothrix
|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 Chaenactidinae]]</div><div class="higher-taxon"><small>genus</small>[[Hymenothrix]]</div></div>
|etymology=Greek hymen, membrane, and thrix, hair, possibly alluding to scarious-aristate pappus scales
|volume=Volume 21
|mention_page=page 364, 365
|treatment_page=page 387
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism duration;whole-organism atypical some measurement;whole-organism some measurement;whole-organism duration;whole-organism duration"><b>Annuals,</b> biennials, or perennials, 10–70 [–150] cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem architecture"><b>Stems </b>erect, branched.</span> <span class="statement" id="st-d0_s2" data-properties=""><b>Leaves </b>basal and cauline;</span> <span class="statement" id="st-d0_s3" data-properties="">mostly alternate (proximal opposite);</span> <span class="statement" id="st-d0_s4" data-properties="leaf position;leaf position;leaf arrangement;leaf architecture">petiolate;</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;ultimate margin architecture or shape;face relief;face pubescence">blades 2-ternately [pinnately] lobed, ultimate margins entire, faces usually ± scabrellous (hairs white, antrorse, 0.1–0.5 mm), sometimes glabrate, sometimes glanddotted.</span> <span class="statement" id="st-d0_s6" data-properties="head architecture;head architecture;array architecture"><b>Heads </b>radiate or discoid, in corymbiform to paniculiform arrays.</span> <span class="statement" id="st-d0_s7" data-properties="involucre shape;involucre diameter"><b>Involucres </b>obconic to hemispheric, 4–8+ mm diam.</span> <span class="statement" id="st-d0_s8" data-properties="phyllary duration;phyllary quantity;series quantity"><b>Phyllaries </b>persistent, 8–16 in 2–3 series (reflexed in fruit, obovate or oblanceolate to linear, subequal, sometimes subtended by 1–3 bractlets, thin-herbaceous to membranous, margins scarious, often tinged with purple).</span> <span class="statement" id="st-d0_s9" data-properties="receptacle shape;receptacle shape;receptacle shape;receptacle architecture or pubescence or relief;receptacle architecture"><b>Receptacles </b>flat or convex, knobby or smooth, epaleate.</span> <span class="statement" id="st-d0_s10" data-properties="ray-floret presence;ray-floret quantity;ray-floret architecture;ray-floret reproduction"><b>Ray-</b>florets 0, or 3–8+, pistillate, fertile;</span> <span class="statement" id="st-d0_s11" data-properties="corolla coloration">corollas yellowish.</span> <span class="statement" id="st-d0_s12" data-properties="disc-floret quantity;disc-floret reproduction;disc-floret reproduction"><b>Disc-</b>florets 10–30+, bisexual, fertile;</span> <span class="statement" id="st-d0_s13" data-properties="corolla coloration;throat variability;throat shape;throat length or size;lobe quantity;lobe shape;lobe shape">corollas yellowish or whitish or pinkish to purplish (sparsely glandular-hairy), tubes about equaling cylindric throats or much longer than broadly funnelform throats, lobes 5, lance-oblong or lance-linear.</span> <span class="statement" id="st-d0_s14" data-properties="cypsela shape;cypsela shape;face architecture or shape;face pubescence"><b>Cypselae </b>obpyramidal, 4–5-angled, faces ribbed and sparsely hairy (hairs straight);</span> <span class="statement" id="st-d0_s15" data-properties="scale quantity;scale shape;scale size or width;scale architecture;series quantity">pappi persistent, of 12–18 narrowly lanceolate to subulate, medially thickened, scarious-margined scales in 1 series, some or all ± aristate.</span> <span class="statement" id="st-d0_s16" data-properties="pappus duration;pappus shape;x chromosome quantity">x = 12.</span><!--

-->{{Treatment/Body
|distribution=sw United States;Mexico
|discussion=<p>Species 5 (3 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=turner1962a
|text=Turner, B. L. 1962. Taxonomy of Hymenothrix (Helenieae, Compositae). Brittonia 14: 101–120.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Phyllaries (8–)12–16, mostly oblong to ovate or obovate; corollas white or pinkish to purplish, lobe lengths 2–3+ times throats; anthers pinkish to purplish
|[[Hymenothrix wrightii|Hymenothrix wrightii]]
|-id=key-0-1
|1
|Phyllaries 8(–12), mostly linear to narrowly oblanceolate; corollas creamy to bright yellow, lobe lengths 0.3–1 times throats; anthers yellowish
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Rays 3–8; corollas of disc florets mostly 5–7 mm
|[[Hymenothrix wislizeni|Hymenothrix wislizeni]]
|-id=key-0-2
|2
|Rays 0; corollas of disc florets mostly 4–4.5 mm
|[[Hymenothrix loomisii|Hymenothrix loomisii]]
|}
</div></div><!--

-->{{#Taxon:
name=Hymenothrix
|author=John L. Strother
|authority=A. Gray
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=sw United States;Mexico
|reference=turner1962a
|publication title=Mem. Amer. Acad. Arts, n. s.
|publication year=1849
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21_972.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Chaenactidinae
|genus=Hymenothrix
|array architecture=corymbiform;paniculiform
|blade shape=lobed
|corolla coloration=whitish or pinkish;purplish
|cypsela shape=4-5-angled;obpyramidal
|disc-floret quantity=10;30
|disc-floret reproduction=fertile;bisexual
|face architecture or shape=ribbed
|face pubescence=hairy;glabrate
|face relief=scabrellous
|head architecture=discoid;radiate
|involucre diameter=4mm;8mm
|involucre shape=obconic;hemispheric
|leaf architecture=petiolate
|leaf arrangement=alternate
|leaf position=cauline;basal
|lobe quantity=5
|lobe shape=lance-linear;lance-oblong
|pappus duration=persistent
|pappus shape=aristate
|phyllary duration=persistent
|phyllary quantity=8;16
|ray-floret architecture=pistillate
|ray-floret presence=absent
|ray-floret quantity=3;8
|ray-floret reproduction=fertile
|receptacle architecture=epaleate
|receptacle architecture or pubescence or relief=smooth
|receptacle shape=knobby;convex;flat
|scale architecture=scarious-margined
|scale quantity=12;18
|scale shape=narrowly lanceolate;subulate
|scale size or width=thickened
|series quantity=1;2;3
|stem architecture=branched
|stem orientation=erect
|throat length or size=much longer
|throat shape=cylindric
|throat variability=equaling
|ultimate margin architecture or shape=entire
|whole-organism atypical some measurement=70cm;150cm
|whole-organism duration=perennial;biennial;annual
|whole-organism some measurement=10cm;70cm
|x chromosome quantity=12
}}<!--

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