View source for Tanacetum ← Tanacetum You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Tanacetum |accepted_authority=Linnaeus |publications={{Treatment/Publication |title=Sp. Pl. |place=2: 843. 1753 |year=1753 }}, {{Treatment/Publication |title=Gen. Pl. ed. |place=5, 366. 1754 |year=1754 }} |common_names=Tansy;tanaisie |basionyms= |synonyms= |hierarchy=Asteraceae;Asteraceae tribe Anthemideae;Tanacetum |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Anthemideae]]</div><div class="higher-taxon"><small>genus</small>[[Tanacetum]]</div></div> |etymology=Derivation unknown; possibly Greek athanasia, immortality, through Medieval Latin tanazita |volume=Volume 19 |mention_page=page 31, 48, 49, 52, 53, 68, 486, 488 |treatment_page=page 489 }}<!-- --><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>[annuals, subshrubs], 5–150 cm (usually rhizomatous; usually aromatic). <b>Stems</b> 1 or 2–5+, erect or prostrate to ascending, branched proximally and/or distally, glabrous or hairy (hairs basifixed and/or medifixed, sometimes stellate). <b>Leaves</b> basal and/or cauline; alternate; petiolate or sessile; blades mostly obovate to spatulate, usually 1–3-pinnately lobed, ultimate margins entire, crenate, or dentate, faces glabrous or hairy. <b>Heads</b> usually radiate, sometimes disciform (or quasi-radiate or -radiant), usually in lax to dense, corymbiform arrays, rarely borne singly. <b>Involucres</b> mostly hemispheric or broader, (3–)5–22+ mm diam. <b>Phyllaries</b> persistent, (20–)30–60+ in (2–)3–5+ series, distinct, ± ovate to oblong or oblong to lanceolate or lance-linear (sometimes carinate), unequal, margins and apices (pale to dark brown or blackish) scarious (tips sometimes dilated). <b>Receptacles</b> flat to conic or hemispheric (sometimes hairy), epaleate. <b>Ray</b> florets usually 10–21+ (pistillate and fertile or neuter; corollas pale yellow to yellow or white, usually with yellowish bases [pink], laminae oblong to flabellate), sometimes 0 (in disciform or quasi-radiate or -radiant heads, peripheral pistillate florets 8–30+; corollas pale yellow, ± zygomorphic, lobes 3–4, sometimes ± raylike). <b>Disc</b> florets 60–300+, bisexual, fertile; corollas yellow, tubes ± cylindric, throats narrowly funnelform to campanulate, lobes (4–)5, ± deltate. <b>Cypselae</b> obconic or ± columnar (circular in cross section), ribs (4–)5–10(–12+), faces usually gland-dotted, sometimes glabrous (pericarps without myxogenic cells or resin sacs, embryo sac development tetrasporic); pappi usually coroniform, rarely 0 [distinct scales or each pappus an adaxial auricle]. <b>x</b> = 9 (polyploidy).</span><!-- -->{{Treatment/Body |distribution=North America;Europe;Asia;n Africa;some species widely cultivated. |discussion=<p>Species 160 (4 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 |Leaves usually not pinnately lobed (sometimes with 1–4+ lateral lobes near bases of blades), ultimate margins ± crenate |[[Tanacetum balsamita|Tanacetum balsamita]] |-id=key-0-1 |1 |Leaves usually 1–3-pinnately lobed, ultimate margins entire or dentate |[[#key-0-2| > 2]] |-id=key-0-2 |2 |Leaf blades 1–2-pinnately lobed (primary lobes 3–5 pairs, ± ovate), faces (at least abaxial) usually puberulent; ray florets 10–21+ (more in "doubles"), corollas white, laminae 2–8(–12+) mm; pappi 0 or coroniform (0.1–0.2+ mm) |[[Tanacetum parthenium|Tanacetum parthenium]] |-id=key-0-2 |2 |Leaf blades 2–3-pinnately lobed (primary lobes 4–24+ pairs, ± oblong to elliptic or linear), faces usually arachno-villous to villous, sometimes glabrescent or glabrous; ray florets 0 or 8–30+, corollas pale yellow to yellow, laminae 1–8+ mm; pappi coroniform (0.1–0.5+ mm) |[[#key-0-3| > 3]] |-id=key-0-3 |3 |Leaves: faces glabrous or sparsely hairy; heads (disciform) 20–200 in corymbiform arrays; involucres 5–10 mm diam |[[Tanacetum vulgare|Tanacetum vulgare]] |-id=key-0-3 |3 |Leaves: faces usually ± villous or arachno-villous to lanate, sometimes glabrescent or glabrate; heads (radiate, quasi-radiant or -radiate, or disciform) (2–)5–12(–20+) in corymbiform arrays or borne singly; involucres 8–22+ mm diam |[[Tanacetum bipinnatum|Tanacetum bipinnatum]] |} </div></div><!-- -->{{#Taxon: name=Tanacetum |author=Linda E. Watson |authority=Linnaeus |rank=genus |parent rank=tribe |synonyms= |basionyms= |family=Asteraceae |distribution=North America;Europe;Asia;n Africa;some species widely cultivated. |reference=None |publication title=Sp. Pl.;Gen. Pl. ed. |publication year=1753;1754 |special status= |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V19_816.xml |tribe=Asteraceae tribe Anthemideae |genus=Tanacetum }}<!-- -->[[Category:Treatment]][[Category:Asteraceae tribe Anthemideae]] Templates used on this page: Template:Asteraceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Publication (view source) Return to Tanacetum.