View source for Lygodesmia

{{Treatment/ID
|accepted_name=Lygodesmia
|accepted_authority=D. Don
|publications={{Treatment/Publication
|title=Edinburgh New Philos. J.
|place=6: 311. 1829
|year=1829
}}
|common_names=Skeletonplant;rush pink
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Cichorieae;Lygodesmia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Cichorieae]]</div><div class="higher-taxon"><small>genus</small>[[Lygodesmia]]</div></div>
|etymology=Greek lygos, twig or stick, and desme, bundle, alluding to clumped, sticklike stems with reduced leaves
|volume=Volume 19
|mention_page=page 219, 360, 361, 370
|treatment_page=page 369
}}<!--

--><span class="statement" id="st-d0_s0" data-properties=""><b>Perennials,</b> 5–80 cm;</span> <span class="statement" id="st-d0_s1" data-properties="whole-organism some measurement;whole-organism architecture;whole-organism architecture;whole-organism duration">rhizomatous or taprooted (roots vertical, rhizomes spreading).</span> <span class="statement" id="st-d0_s2" data-properties="stem quantity;stem architecture;stem architecture;stem pubescence;stem pubescence"><b>Stems </b>1–5+, (green to gray-green, rushlike, ± striate), simple to or much branched proximally and/or distally, usually glabrous, rarely tomentulose.</span> <span class="statement" id="st-d0_s3" data-properties=""><b>Leaves </b>basal (sometimes in rosettes) and cauline;</span> <span class="statement" id="st-d0_s4" data-properties="leaf position;leaf position;leaf architecture">sessile;</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade size;margin shape;margin shape">blades linear to subulate, sometimes reduced to scales, margins entire or sparingly pinnately laciniately lobed (faces usually glabrous, rarely tomentulose).</span> <span class="statement" id="st-d0_s6" data-properties="head arrangement;head arrangement;array architecture or fragility;array architecture"><b>Heads </b>borne singly or in loose, corymbiform arrays.</span> <span class="statement" id="st-d0_s7" data-properties="peduncle shape;peduncle architecture"><b>Peduncles </b>not inflated distally, bracteate.</span> <span class="statement" id="st-d0_s8" data-properties="calyculus shape;bracteole size;series quantity;margin texture;margin architecture or pubescence or shape;face pubescence;face pubescence;face relief or texture"><b>Calyculi </b>of 8–16, ovate to subulate or scalelike bracteoles in 1–2 series, unequal, margins scarious to erose-ciliate, faces glabrous or tomentulose, sometimes roughened.</span> <span class="statement" id="st-d0_s9" data-properties=""><b>Involucres </b>cylindric, 5–8 mm diam.</span> <span class="statement" id="st-d0_s10" data-properties="involucre shape;involucre diameter">(apices truncate, narrow or spreading).</span> <span class="statement" id="st-d0_s11" data-properties="phyllary quantity;phyllary coloration;phyllary arrangement or course or shape;phyllary variability;series quantity;margin texture;face pubescence;face pubescence;face relief or texture"><b>Phyllaries </b>5–12 in ± 1 series, grayish green, ± linear, equal, margins scarious, faces glabrous or puberulent, sometimes roughened.</span> <span class="statement" id="st-d0_s12" data-properties="receptacle prominence or shape;receptacle relief;receptacle pubescence or relief;receptacle architecture"><b>Receptacles </b>flat, sometimes pitted, sometimes scabrous, epaleate.</span> <span class="statement" id="st-d0_s13" data-properties="floret quantity"><b>Florets </b>5–12;</span> <span class="statement" id="st-d0_s14" data-properties="corolla coloration;corolla coloration">corollas usually pink to lavender or purple, rarely white.</span> <span class="statement" id="st-d0_s15" data-properties="cypsela coloration;cypsela shape;cypsela course;cypsela shape;cypsela shape;cypsela shape;cypsela architecture;apex shape;apex architecture or shape;face relief;face relief;face pubescence"><b>Cypselae </b>pale green to tan, subcylindric, straight or arcuate, subterete or longitudinally angled or sulcate, apices sometimes narrowed, not beaked, faces smooth or rugose-roughened, glabrous;</span> <span class="statement" id="st-d0_s16" data-properties="pappus duration;pappus coloration;pappus coloration;pappus fusion;series quantity">pappi persistent, of 60–80, tawny or white, ± connate, smooth bristles in 1–2+ series.</span> <span class="statement" id="st-d0_s17" data-properties="bristle architecture or pubescence or relief;x chromosome quantity">x = 9.</span><!--

-->{{Treatment/Body
|distribution=North America;n Mexico
|discussion=<p>Species 5 (5 in the flora).</p><!--
--><p>Lygodesmia is easily recognized by the green, rushlike stems, narrow and often greatly reduced leaves, and terminal heads of showy, rosy, ligulate florets. It has been consideredcongeneric with Stephanomeria, Prenanthella, and Shinnersoseris; A. S. Tomb (1980) concluded that those taxa are not closely related. The annual species with plumose pappus bristles that formerly were included in Lygodesmia have been removed to those genera.</p>
|tables=
|references={{Treatment/Reference
|id=tomb1980a
|text=Tomb, A. S. 1980. Taxonomy of Lygodesmia (Asteraceae). Syst. Bot. Monogr. 1: 1–51.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Involucres 10–16 mm; phyllary apices not appendaged; corollas 18–20 mm, ligules 3–4 mm wide; cypselae 6–10 mm; pappi 6–9 mm
|[[Lygodesmia juncea|Lygodesmia juncea]]
|-id=key-0-1
|1
|Involucres 14–25 mm; phyllary apices appendaged (reduced in L. grandiflora var. arizonica); corollas 12–40 mm, ligules 4–6(–10) mm wide; cypselae 10–19 mm; pappi 10–18 mm
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Basal leaves not forming rosettes; cauline leaves well developed, not reduced to scales; plants 5–25(–60) cm
|[[Lygodesmia grandiflora|Lygodesmia grandiflora]]
|-id=key-0-2
|2
|Basal leaves forming rosettes (often withered at flowering); cauline leaves mostly reduced to scales; plants 25–65 cm
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Phyllaries 5–7; florets 5(–7)
|[[Lygodesmia ramosissima|Lygodesmia ramosissima]]
|-id=key-0-3
|3
|Phyllaries 8–10; florets 8–12
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Basal leaves entire; cypselae sulcate on inner faces; stems strongly striate; Florida, Georgia
|[[Lygodesmia aphylla|Lygodesmia aphylla]]
|-id=key-0-4
|4
|Basal leaves laciniately lobed; cypselae smooth on inner faces; stems weakly striate; New Mexico, Oklahoma, Texas
|[[Lygodesmia texana|Lygodesmia texana]]
|}
</div></div><!--

-->{{#Taxon:
name=Lygodesmia
|author=David J. Bogler
|authority=D. Don
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Bee F. Gunn
|illustration copyright=Flora of North America Association
|distribution=North America;n Mexico
|reference=tomb1980a
|publication title=Edinburgh New Philos. J.
|publication year=1829
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V19_591.xml
|tribe=Asteraceae tribe Cichorieae
|genus=Lygodesmia
|apex architecture or shape=not beaked
|apex shape=narrowed
|array architecture=corymbiform
|array architecture or fragility=loose
|blade shape=linear;subulate
|blade size=reduced
|bracteole size=unequal
|bristle architecture or pubescence or relief=smooth
|calyculus shape=ovate;subulate or scalelike
|corolla coloration=white;usually pink;lavender or purple
|cypsela architecture=sulcate
|cypsela coloration=pale green;tan
|cypsela course=straight
|cypsela shape=angled;subterete;arcuate;subcylindric
|face pubescence=glabrous;puberulent;glabrous;tomentulose;glabrous
|face relief=rugose-roughened;smooth
|face relief or texture=roughened;roughened
|floret quantity=5;12
|head arrangement=in loose , corymbiform arrays;singly
|involucre diameter=5mm;8mm
|involucre shape=cylindric
|leaf architecture=sessile
|leaf position=cauline;basal
|margin architecture or pubescence or shape=erose-ciliate
|margin shape=lobed;entire
|margin texture=scarious;scarious
|pappus coloration=white;tawny
|pappus duration=persistent
|pappus fusion=connate
|peduncle architecture=bracteate
|peduncle shape=inflated
|phyllary arrangement or course or shape=linear
|phyllary coloration=grayish green
|phyllary quantity=5;12
|phyllary variability=equal
|receptacle architecture=epaleate
|receptacle prominence or shape=flat
|receptacle pubescence or relief=scabrous
|receptacle relief=pitted
|series quantity=1;2
|stem architecture=branched;simple
|stem pubescence=tomentulose;glabrous
|stem quantity=1;5
|whole-organism architecture=taprooted;rhizomatous
|whole-organism duration=perennial
|whole-organism some measurement=5cm;80cm
|x chromosome quantity=9
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae tribe Cichorieae]]