View source for Porophyllum

{{Treatment/ID
|accepted_name=Porophyllum
|accepted_authority=Guettard
|publications={{Treatment/Publication
|title=Hist. Acad. Roy. Sci. Mém. Math. Phys. (Paris,
|place=4to) 1750: 377. 1754
|year=1754
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Pectidinae;Porophyllum
|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 Pectidinae]]</div><div class="higher-taxon"><small>genus</small>[[Porophyllum]]</div></div>
|etymology=Greek poros, hole, and phyllon, leaf, alluding to gland-dotted leaf blades
|volume=Volume 21
|mention_page=page 222
|treatment_page=page 233
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> perennials, subshrubs, or shrubs, 10–120[–200+] cm. <b>Stems</b> erect, usually strictly branched. <b>Leaves</b> cauline; opposite or alternate; petiolate or sessile; blades orbiculate to linear or filiform, margins crenate or entire, faces usually glabrous (oil-glands scattered and/or at margins). <b>Heads</b> discoid, borne singly or in loose, ± corymbiform arrays. <b>Calyculi</b> 0. <b>Involucres</b> cylindric to campanulate [turbinate], 3–12 mm diam. <b>Phyllaries</b> 5–10 in ± 2 series (distinct to bases, oblong or lanceolate to linear, bearing oval to linear oil-glands). <b>Receptacles</b> convex to conic, pitted, epaleate. <b>Ray</b> florets 0. <b>Disc</b> florets (5–)10–80[–100+], bisexual, fertile; corollas usually yellow, sometimes whitish to greenish or purplish [brownish], tubes either very slender, much longer than funnelform throats, or stout, much shorter than narrowly cylindric throats, lobes 5, deltate to lanceolate (often unequal). <b>Cypselae</b> cylindric to fusiform, hirtellous to villous [glabrous]; pappi persistent, of 25–50(–100) coarse to fine bristles in 1–2+ series. <b>x</b> = 12.</span><!--

-->{{Treatment/Body
|distribution=sw United States;Mexico;West Indies (Antilles);Central America;South America.
|discussion=<p>Species ca. 25 (5 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=johnson1969a
|text=Johnson, R. R. 1969. Monograph of the plant genus Porophyllum (Compositae: Helenieae). Univ. Kansas Sci. Bull. 48: 225–267.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Annuals; leaf blades oval or elliptic to obovate, 8–25+ mm wide
|[[Porophyllum ruderale|Porophyllum ruderale]]
|-id=key-0-1
|1
|Perennials, or subshrubs or shrubs; leaf blades linear to filiform, 1–5 mm wide
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Corollas whitish or purplish
|[[Porophyllum gracile|Porophyllum gracile]]
|-id=key-0-2
|2
|Corollas yellow (sometimes tinged reddish)
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Subshrubs or shrubs, 20–60+ cm; phyllaries 7–10
|[[Porophyllum scoparium|Porophyllum scoparium]]
|-id=key-0-3
|3
|Perennials (rarely woody at bases), mostly 5–30 cm; phyllaries 5(–8)
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Internodes mostly 1–5(–12) mm; leaf blades 8–15 × 2 mm; pappi: longer bristles 6–7 mm
|[[Porophyllum pygmaeum|Porophyllum pygmaeum]]
|-id=key-0-4
|4
|Internodes mostly 10–20+ mm; leaf blades 20–60 × 1–2 mm; pappi: longer bristles 8–10 mm
|[[Porophyllum greggii|Porophyllum greggii]]
|}
</div></div><!--

-->{{#Taxon:
name=Porophyllum
|author=John L. Strother
|authority=Guettard
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Linda Ann Vorobik
|illustration copyright=Flora of North America Association
|distribution=sw United States;Mexico;West Indies (Antilles);Central America;South America.
|reference=johnson1969a
|publication title=Hist. Acad. Roy. Sci. Mém. Math. Phys. (Paris,
|publication year=1754
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_567.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Pectidinae
|genus=Porophyllum
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae (tribe Heliantheae) subtribe Pectidinae]]