View source for Chaetopappa

{{Treatment/ID
|accepted_name=Chaetopappa
|accepted_authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|publications={{Treatment/Publication
|title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|place=5: 301. 1836
|year=1836
}}
|basionyms={{Treatment/ID/Basionym
|name=Chaetanthera
|authority=Nuttall
|rank=genus
|publication_title=J. Acad. Nat. Sci. Philadelphia
|publication_place=7: 111. 1834,
}}
|synonyms={{Treatment/ID/Synonym
|name=Leucelene
|authority=Greene
|rank=genus
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Chaetopappa
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Chaetopappa]]</div></div>
|etymology=Greek chaite, long hair, and pappos, pappus
|volume=Volume 20
|mention_page=page 11, 17, 18, 46, 209, 210
|treatment_page=page 206
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>or perennials, 5–30 cm (sometimes glandular); taprooted or rhizomatous. <b>Stems</b> erect or decumbent, branched, strigose to hispido-pilose. <b>Leaves</b> basal (sometimes withering by flowering) and cauline; alternate; sessile or petiolate; blades 1-nerved, linear to oblanceolate-obovate or spatulate, margins entire, faces glabrous, strigose, hispidulous, or hispido-pilose, sometimes stipitate-glandular. <b>Heads</b> radiate, borne singly (terminal, not crowded). <b>Involucres</b> cylindro-turbinate to hemispheric, (3.8–6.5 ×) 2–10 mm. <b>Phyllaries</b> 10–50 in 2–6 series, midnerves not evident or indurate, elliptic to linear-lanceolate, unequal, margins prominently whitish-scarious, faces strigose to glabrate. <b>Receptacles</b> flat or slightly convex, smooth, epaleate. <b>Ray</b> florets 6–24(–30), pistillate, fertile; corollas usually white, sometimes bluish, usually maturing or drying blue or purple (coiling at maturity). <b>Disc</b> florets 5–25, bisexual and fertile or functionally staminate; corollas yellow, tubes much shorter than tubular-funnelform throats, lobes 5, erect, deltate; style-branch appendages broadly to narrowly triangular. <b>Cypselae</b> cylindric to narrowly obovoid, terete to compressed, 2–5-, 8-, or 10-nerved, faces strigose, sometimes gland-dotted; pappi persistent, either in 1 series, of (20–)24–26(–30; usually multiples of 5) barbellate bristles, or hyaline crowns of basally fused scales, or minute, erose, sometimes cuplike crowns, or thickened rings, or in 2 series, outer of (4–)5(–8) minute or broad, white-hyaline or scarious, sometimes irregular scales plus inner of (4–)5(–8) alternating, tawny, sometimes thick, sometimes barbellate bristles. <b>x</b> = 8.</span><!--

-->{{Treatment/Body
|distribution=sc;sw United States;n Mexico.
|discussion=<p>Species 11 (8 in the flora).</p><!--
--><p><i>Chaetopappa</i> is recognized by its entire leaves, unequal phyllaries with sharply delimited, whitish-scarious margins, and small heads with white or bluish coiling rays. The pappus varies among species: bristles, crowns of scales, combinations of bristles and scales, or essentially absent. G. S. Van Horn (1973) clarified distinctions between <i>Chaetopappa</i> and the essentially Californian <i>Pentachaeta</i> and maintained the two as separate genera. <i>Chaetopappa</i> elegans from New Mexico has been transferred to <i>Ionactis</i> (G. L. Nesom 1992), with the clarification of apparent inconsistencies in the base chromosome number of <i>Chaetopappa</i>.</p>
|tables=
|references={{Treatment/Reference
|id=nesom1988a
|text=Nesom, G. L. 1988. Synopsis of Chaetopappa (Compositae: Astereae) with a new species and the inclusion of Leucelene. Phytologia 64: 448–456.
}}{{Treatment/Reference
|id=shinners1946b
|text=Shinners, L. H. 1946b. Revision of the genus Chaetopappa DC. Wrightia 1: 63–81.
}}{{Treatment/Reference
|id=shinners1946c
|text=Shinners, L. H. 1946c. Revision of the genus Leucelene Greene. Wrightia 1: 82–89.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaves densely overlapping, coriaceous, with strongly raised midnerve plus a pair of longitudinal, adaxial grooves
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Leaves not densely overlapping, herbaceous, flat
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Stems 1–2(–5) cm; pappi in 2 series: inner of (4–)5(–6) bristles plus outer of minute scales
|[[Chaetopappa hersheyi|Chaetopappa hersheyi]]
|-id=key-0-2
|2
|Stems 6–12 cm; pappi in 1 series, usually of (20–)24–26(–30) bristles
|[[Chaetopappa ericoides|Chaetopappa ericoides]]
|-id=key-0-3
|3
|Perennials, rhizomatous, without distinct taproot; pappi hyaline crowns
|[[#key-0-4| > 4]]
|-id=key-0-3
|3
|Annuals, taprooted; pappi of scales and bristles, hyaline crowns, or minute rings
|[[#key-0-5| > 5]]
|-id=key-0-4
|4
|Proximal cauline leaf blades spatulate to spatulate-obovate, 2–5 mm wide, gradually or little reduced distally, bases attenuate; pappi hyaline crowns of basally fused scales 0.3–0.8 mm
|[[Chaetopappa parryi|Chaetopappa parryi]]
|-id=key-0-4
|4
|Proximal cauline leaf blades oblong to lanceolate-oblong, 6–12 mm wide, gradually to abruptly reduced distally, bases truncate to subcordate; pappi thickened rings or minute, erose crowns less than 0.1 mm
|[[Chaetopappa effusa|Chaetopappa effusa]]
|-id=key-0-5
|5
|Pappi in 1 series: white-hyaline, erose-margined, asymmetric, cuplike crowns or minute, thickened rings
|[[#key-0-6| > 6]]
|-id=key-0-5
|5
|Pappi in 2 series: outer scales and inner bristles
|[[#key-0-7| > 7]]
|-id=key-0-6
|6
|Pappi white-hyaline, erose-margined, asymmetric cuplike crowns
|[[Chaetopappa imberbis|Chaetopappa imberbis]]
|-id=key-0-6
|6
|Pappi minute, thickened rings
|[[Chaetopappa bellidifolia|Chaetopappa bellidifolia]]
|-id=key-0-7
|7
|Involucres cylindro-turbinate, 2.5–5 mm wide; disc florets 6–25; cypselae 5(–6)-nerved
|[[Chaetopappa asteroides|Chaetopappa asteroides]]
|-id=key-0-7
|7
|Involucres hemispheric, 4–10 mm wide; disc florets 33–106; cypselae 2–3-nerved
|[[Chaetopappa bellioides|Chaetopappa bellioides]]
|}
</div></div><!--

-->{{#Taxon:
name=Chaetopappa
|author=Guy L. Nesom
|authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|rank=genus
|parent rank=tribe
|synonyms=Leucelene
|basionyms=Chaetanthera
|family=Asteraceae
|illustrator=Barbara Alongi
|illustration copyright=Flora of North America Association
|distribution=sc;sw United States;n Mexico.
|reference=nesom1988a;shinners1946b;shinners1946c
|publication title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication year=1836
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V19-20-21/V20_457.xml
|tribe=Asteraceae tribe Astereae
|genus=Chaetopappa
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae tribe Astereae]]