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{{Short description|Species of flowering plant}}
{{taxobox
{{Speciesbox
|image = Perityle-emoryi-20080322-4.JPG
|genus = ''[[Perityle]]''▼
|regnum = [[Plantae]]
|species = '''''P. emoryi'''''▼
|unranked_divisio = [[Angiosperms]]
|binomial_authorityauthority = [[John Torrey|Torr.]]▼
|unranked_classis = [[Eudicots]]
|}}▼
|unranked_ordo = [[Asterids]]
|ordo = [[Asterales]]
|familia = [[Asteraceae]]
|subfamilia = [[Asteroideae]]
|tribus = [[Perityleae]]
▲|genus = ''[[Perityle]]''
▲|species = '''''P. emoryi'''''
|binomial = ''Perityle emoryi''
▲|binomial_authority = [[John Torrey|Torr.]]
▲|}}
'''''Perityle emoryi''''' is a species of flowering plant in the [[Asteraceae|aster family]] known by the common name '''Emory's rockdaisy'''. It is native to the [[Southwestern United States]], [[Southern California]], [[Northwest Mexico]], and the [[Baja California Peninsula]]. It is a common wildflower of the deserts, and can also be found in California coastal regions. ▼
 
▲'''''Perityle emoryi''''' is a species of flowering plant in the [[Asteraceae|aster family]] known by the common name '''Emory's rockdaisy'''. It is native to the [[Southwestern United States]], [[Southern California]], [[Northwestnorthwestern Mexico]], and thewestern [[Baja CaliforniaSouth PeninsulaAmerica]]. It is a common wildflower of the deserts, and can also be found in Californiathe coastal regions. of [[the Californias]], [[Sonora]], and [[Sinaloa]].
It grows in many types of habitat, it tolerates disturbance, and it can become somewhat [[noxious weed|weedy]]. The plant is also known from [[Chile]] and [[Peru]] and it is an [[introduced species]] in parts of [[Hawaii]]. Its distribution is apparently expanding.<ref>[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250067319 Flora of North America]</ref> ▼
 
▲It grows in many types of habitat, it tolerates disturbance, and it can become somewhat [[noxious weed|weedy]]. The plant is also known from [[Chile]] and [[Peru]] and it is an [[introduced species]] in parts of [[Hawaii]]. Its distribution is apparently expanding.<ref name=":0">[http://www.efloras.org/florataxon.aspx?flora_id={{EFloras|1&taxon_id=|250067319|Perityle Flora of North America]emoryi}}</ref>
 
==Description==
''Perityle emoryi'', a [[Polyploidy|polyploid]] plant, is quite variable genetically and in appearance. It is an annual herb growing 2 to 60 centimeters tall, its stem small, delicate, and simple, or thick, branching, and sprawling. It is usually hairy and glandular in texture. The alternately arranged leaves have blades of various shapes which are toothed or divided into lobes and borne on [[Petiole (botany)|petioles]].
 
The [[inflorescence]] is a single [[Head (botany)|flower head]] or an array of a few or many heads. The head is hemispherical to bell-shaped and generally no more than a centimeter wide. The head has a center of many golden disc florets and a fringe of 8 to 12 white ray florets each just a few millimeters long. The fruit is an [[achene]], usually with a [[Pappus (flower structure)|pappus]] at the tip.
 
==Distribution and habitat==
''Perityle emoryi'' is naturally distributed throughout southwestern North America and western South America, an [[Antitropical distribution|amphitropical distribution]].
 
In North America, it is distributed across the deserts of Arizona, California, Baja California, Baja California Sur, Nevada, Utah, Sonora, and Sinaloa. In Southern California it is also rarely found in coastal regions and the [[Peninsular Ranges]], and becomes widespread throughout almost all the ecosystems of the [[Baja California peninsula]], except for the Cape region and higher mountains.<ref name=":0" /><ref name="BajaChecklist">{{Cite journal |last1=Rebman |first1=Jon P. |last2=Gibson |first2=Judy |last3=Rich |first3=Karen |date=15 November 2016 |title=Annotated Checklist of the Vascular Plants of Baja California, Mexico |url=http://sdplantatlas.org/pdffiles/BajaChecklist2016.pdf |journal=Proceedings of the San Diego Society of Natural History |publisher=[[San Diego Natural History Museum]] |volume=45 |pages=69 |via=San Diego Plant Atlas}}</ref>
 
''Perityle emoryi'' is also found on the eastern Pacific island of [[Guadalupe Island|Guadalupe]].<ref name="BajaChecklist" />
 
==References==
{{reflistReflist}}
 
==External links==
{{Commons category|position=left|Perityle emoryi}}
*[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1684,1685 Jepson Manual Treatment = ''Perityle emoryi'']
*[http://plants.usda.gov/java/profile?symbol=PEEM USDA Plants Profile]
*[http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Perityle+emoryi CalPhotos gallery of ''Perityle emoryi'' - Photo gallery]
{{commons|Perityle emoryi}}
 
{{Taxonbar|from=Q7168922}}
[[Category:Asteroideae]]
 
[[Category:Flora of Northwestern Mexico]]
[[Category:Perityleae]]
[[Category:Flora of the Southwestern United States]]
[[Category:Flora of Baja California]]<!---for CA habitats not below--->
[[Category:Flora of Baja California Sur]]
[[Category:Flora of Bajathe California Surdesert regions]]
[[Category:Flora of Sonora]]
[[Category:Flora of Chile]]
[[Category:Flora of the California desert regions]]
[[Category:Flora of the Sonoran Deserts]]
[[Category:NatureNatural history of the Mojave Desert]]
[[Category:Natural history of the Colorado Desert]]
[[Category:Taxa named by John Torrey]]
[[Category:Flora without expected TNC conservation status]]
 
 
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