View source for Perityle

{{Treatment/ID
|accepted_name=Perityle
|accepted_authority=Bentham
|publications={{Treatment/Publication
|title=Bot. Voy. Sulphur,
|place=23, plate 15. 1844
|year=1844
}}
|common_names=Rock daisy
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Peritylinae;Perityle
|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>[[Perityle]]</div></div>
|etymology=Greek peri, around, and tyle, a callus, alluding to calloused cypselae margins
|volume=Volume 21
|mention_page=page 333, 334
|treatment_page=page 317
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> perennials, subshrubs, or shrubs, 2–45(–75) cm (glabrous or hairy, often gland-dotted). <b>Stems</b> erect to pendent. <b>Leaves</b> mostly cauline; often proximally opposite, distally alternate; petiolate or sessile; blades usually 3-lobed, ultimate margins entire, toothed, or lobed. <b>Heads</b> radiate or discoid, borne singly or in corymbiform arrays. <b>Involucres</b> campanulate, cylindric, funnelform, or hemispheric, 3–15 mm diam. <b>Phyllaries</b> persistent, 5–28 in (1–)2(–3) series (distinct, linear to ovate, equal or subequal, flat or keeled, glabrous or hairy, apices obtuse, acute, or attenuate). <b>Receptacles</b> flat or convex, pitted, epaleate. <b>Ray</b> florets 0, or (1–)3–18, pistillate, fertile; corollas cream, yellow, or white (showy or rudimentary). <b>Disc</b> florets 5–200, bisexual, fertile; corollas cream, yellow, or white, tubes shorter than or nearly equal to cylindric, funnelform, or campanulate throats, lobes 4, ± deltate (acute; stamens 4; style branches flattened, linear, usually tapering to fine, minutely hairy tips). <b>Cypselae</b> (black) flattened to subcylindric, linear to oblanceolate or obovate (margins ± calloused and glabrous, hairy, or ciliate, faces usually hairy, sometimes glabrous); pappi 0, or persistent or falling, of 1–35 bristles plus callous crowns or hyaline scales. <b>x</b> = 17, 19.</span><!--

-->{{Treatment/Body
|distribution=United States;Mexico;South America.
|discussion=<p>Species 66 (35 in the flora).</p><!--
--><p>Most species of <i>Perityle</i> are rock-dwelling subshrubs exhibiting geographic speciation; most are found in the eroded mountain and basin region of the southwestern United States.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Pappi (disc florets) usually each of 8–35 unequal, antrorsely barbellulate bristles 0.5–3.5 mm (in P. vitreomontana all but 2–3 may be reduced to vestigial nubs); New Mexico, Texas
|[[Perityle sect. Pappothrix|Perityle sect. Pappothrix]]
|-id=key-0-1
|1
|Pappi (disc florets) 0, or of 1–2(–6) bristles, sometimes plus callous crowns or scales; Arizona, California, Nevada, New Mexico, Texas, and Utah
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Pappi (disc florets) 0, or of 1–2(–3) unequal to subequal, ± barbellate bristles 0.5–4(–6) mm plus hyaline, laciniate scales; margins of cypselae usually densely ciliate
|[[Perityle sect. Perityle|Perityle sect. Perityle]]
|-id=key-0-2
|2
|Pappi (disc florets) 0, or of 1–2(–6) equal or subequal, antrorsely barbellulate or subplumose bristles 0.5–4.6 mm plus callous crowns or hyaline scales; margins of cypselae usually sparsely short-hairy
|[[Perityle sect. Laphamia|Perityle sect. Laphamia]]
|}
</div></div><!--

-->{{#Taxon:
name=Perityle
|author=Sharon C. Yarborough;A. Michael Powell
|authority=Bentham
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Bee F. Gunn
|distribution=United States;Mexico;South America.
|reference=None
|publication title=Bot. Voy. Sulphur,
|publication year=1844
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V21_784.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Peritylinae
|genus=Perityle
}}<!--

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