View source for Geraea

{{Treatment/ID
|accepted_name=Geraea
|accepted_authority=Torrey & A. Gray
|publications={{Treatment/Publication
|title=Proc. Amer. Acad. Arts
|place=1: 48. 1847
|year=1847
}}
|common_names=Desert-sunflower
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Ecliptinae;Geraea
|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 Ecliptinae]]</div><div class="higher-taxon"><small>genus</small>[[Geraea]]</div></div>
|etymology=Greek geraios, old, alluding to white-haired involucre of Geraea canescens
|volume=Volume 21
|mention_page=page 65, 66, 119
|treatment_page=page 122
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>or perennials, 10–100 cm. <b>Stems</b> erect, branched (branches ascending). <b>Leaves</b> basal and cauline; alternate; sessile or petiolate; blades (3-nerved) elliptic, lanceolate, oblanceolate, oblong, or ovate, bases auriculate or tapering, margins entire or toothed, faces ± canescent or glandular-puberulent to stipitate-glandular. <b>Heads</b> radiate or discoid, borne singly or in open, paniculiform arrays (peduncles usually longer than involucres). <b>Involucres</b> hemispheric, 7–15 mm diam. <b>Phyllaries</b> persistent, 20–30+ in 2–3+ series (distinct, narrowly lanceolate to linear or narrowly lance-oblong to lance-ovate, subequal to unequal, outer shorter). <b>Receptacles</b> convex, paleate (paleae ± conduplicate, folded around and falling with cypselae). <b>Ray</b> florets 0 or 10–21, neuter; corollas yellow. <b>Disc</b> florets 60–200+, bisexual, fertile; corollas yellow, tubes shorter than gradually to abruptly expanded throats, lobes 5, triangular. <b>Cypselae</b> (black) strongly compressed, narrowly cuneate (margins ± white, long-ciliate, faces ± hairy); pappi persistent, of 2 awns or subulate scales. <b>x</b> = 18.</span><!--

-->{{Treatment/Body
|distribution=sw United States;nw Mexico.
|discussion=<p>Species 2 (2 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Annuals; leaves sessile or petiolate, bases of blades tapering to wings, faces ± canescent; phyllaries narrowly lanceolate to linear, apices acute (margins shaggy-ciliate); ray florets 10–21
|[[Geraea canescens|Geraea canescens]]
|-id=key-0-1
|1
|Perennials; leaves sessile, bases of blades ± auriculate, faces glandular-puberulent; phyllaries narrowly lance-oblong to lance-ovate, apices obtuse (faces densely glandular-puberulent); ray florets 0
|[[Geraea viscida|Geraea viscida]]
|}
</div></div><!--

-->{{#Taxon:
name=Geraea
|author=Curtis Clark
|authority=Torrey & A. Gray
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=sw United States;nw Mexico.
|reference=None
|publication title=Proc. Amer. Acad. Arts
|publication year=1847
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_298.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ecliptinae
|genus=Geraea
}}<!--

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