View source for Pericome

{{Treatment/ID
|accepted_name=Pericome
|accepted_authority=A. Gray
|publications={{Treatment/Publication
|title=Smithsonian Contr. Knowl.
|place=5(6): 81. 1853
|year=1853
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Peritylinae;Pericome
|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 Peritylinae]]</div><div class="higher-taxon"><small>genus</small>[[Pericome]]</div></div>
|etymology=Greek peri, around, and come, tuft of hairs, alluding to ciliate margins of cypselae
|volume=Volume 21
|mention_page=page 317
|treatment_page=page 334
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>or subshrubs, (20–)50–150+ cm. <b>Stems</b> multiple, spreading, branched. <b>Leaves</b> mostly cauline; mostly opposite, distal sometimes alternate; petiolate; blades (3-nerved) usually deltate-hastate basally, sometimes subhastate, ovate, or cordate, margins entire, cleft, toothed, or 3–5-lobed (apices long-attenuate, caudate), faces sparsely to densely puberulent, usually copiously gland-dotted (distal leaves rarely tomentulose). <b>Heads</b> discoid, in corymbiform or compound-corymbiform arrays. <b>Involucres</b> turbinate-campanulate, 4–10 mm diam. <b>Phyllaries</b> 16–24 in 1 series (connate 1/2+ their lengths, linear, subequal). <b>Receptacles</b> convex, pitted, epaleate. <b>Disc</b> florets 30–70, bisexual, fertile; corollas yellow (glabrate or densely gland-dotted), tubes mostly shorter than abruptly dilated, cylindric throats, lobes 4, triangular. <b>Cypselae</b> (black with pale margins) flattened, oblong-oblanceolate to narrowly linear-oblanceolate (margins calloused or thin, densely ciliate); pappi 0 or, persistent or falling, vestigial, or of 8–12 distinct or partially connate, fimbriate to laciniate scales (sometimes 1–4 scales aristate) plus 1–2(–6) ciliolate bristles. <b>x</b> = 18.</span><!--

-->{{Treatment/Body
|distribution=sw United States;n Mexico.
|discussion=<p>Species 2 (1 in the flora).</p><!--
--><p>The close relationship of <i>Pericome</i> to <i>Perityle</i> is apparent in the similarity of general vegetative and floral morphology, particularly in the similarities of cypselae and pappus structure. The shrubby habit and capitulescence of densely aggregated heads with united involucral bracts of <i>Pericome</i> distinguish it from <i>Perityle</i>. <i>Pericome</i> is widespread in Upper Sonoran and Montane zones of the southwestern United States.</p>
|tables=
|references={{Treatment/Reference
|id=powell1973b
|text=Powell, A. M. 1973. Taxonomy of Pericome (Compositae–Peritylinae). SouthW. Naturalist 18: 335–339.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Pericome
|author=Sharon C. Yarborough;A. Michael Powell
|authority=A. Gray
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Bee F. Gunn
|illustration copyright=Flora of North America Association
|distribution=sw United States;n Mexico.
|reference=powell1973b
|publication title=Smithsonian Contr. Knowl.
|publication year=1853
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_837.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Peritylinae
|genus=Pericome
}}<!--

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