View source for Thelesperma

{{Treatment/ID
|accepted_name=Thelesperma
|accepted_authority=Lessing
|publications={{Treatment/Publication
|title=Linnaea
|place=6: 511. 1831
|year=1831
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Coreopsidinae;Thelesperma
|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 Coreopsidinae]]</div><div class="higher-taxon"><small>genus</small>[[Thelesperma]]</div></div>
|etymology=Greek thele, nipple, and sperma, seed, alluding to papillate cypselae of original species
|volume=Volume 21
|mention_page=page 184
|treatment_page=page 199
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> perennials, or subshrubs, 10–70+ cm. <b>Stems</b> usually 1, erect, branched distally or ± throughout. <b>Leaves</b> mostly basal, basal and cauline, or mostly cauline; mostly opposite (distal rarely alternate); blades usually 1(–3)-pinnately lobed (ultimate lobes oblanceolate to filiform), faces usually glabrous, rarely hairy. <b>Heads</b> radiate or discoid, borne singly or in loose, corymbiform arrays. <b>Calyculi</b> of 3–8+ distinct, usually spreading or reflexed, usually linear to subulate, herbaceous bractlets. <b>Involucres</b> hemispheric to urceolate, 4–15+ mm diam. <b>Phyllaries</b> 5–8 in ± 2 series, persistent, connate 1/5–7/8+ their lengths, lance-ovate to ovate, ± equal, ± leathery to membranous, margins (of distinct apices) scarious. <b>Receptacles</b> flat to convex, paleate; paleae falling, (whitish with red-brown striae, each ± appressed to abaxial face of subtended cypsela), obovate to oblong, scarious. <b>Ray</b> florets 0 or ca. 8, neuter; corollas yellow or red-brown, or bicolored (yellow and red-brown). <b>Disc</b> florets 20–100+, bisexual, fertile; corollas yellow (with red-brown nerves) or red-brown, either with throats equal to or longer than 5, ± deltate, ± equal lobes, or with throats shorter than 5, ± lance-linear, ± unequal lobes (in either form, the abaxial sinus usually ± deeper than others). <b>Cypselae</b> (dark red-brown or stramineous) outer often arcuate, shorter, inner more columnar, usually some or all ± obcompressed (each usually shed together with its subtending palea), faces smooth or papillate to tuberculate or verrucate, margins sometimes ± winged; pappi 0, or persistent, of 2 retrorsely ciliate, subulate scales or awns. <b>x</b> = 12.</span><!--

-->{{Treatment/Body
|distribution=w North America;Mexico;South America.
|discussion=<p>Species 10+ (9 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=greer1997a
|text=Greer, L. F. 1997. Thelesperma curvicarpum (Asteraceae), an achene form in populations of T. simplicifolium var. simplicifolium and T. filifolium var. filifolium. Southw. Naturalist 42: 242–244.
}}{{Treatment/Reference
|id=hansen2002a
|text=Hansen, C. J., L. Allphin, and M. D. Windham. 2002. Biosystematic analysis of the Thelesperma subnudum complex (Asteraceae). Sida 20: 71–96.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Throats of disc corollas equal to or longer than lobes; pappi usually 0, rarely of 2 awns 0.1–0.3(–0.5) mm
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Throats of disc corollas shorter than lobes; pappi usually of 2 awns or scales (0.5–)1–3 mm, rarely 0
|[[#key-0-4| > 4]]
|-id=key-0-2
|2
|Cauline leaves ± scattered over proximal 3/4+ of plant heights, internodes mostly 45–95 mm
|[[Thelesperma simplicifolium|Thelesperma simplicifolium]]
|-id=key-0-2
|2
|Cauline leaves ± crowded over proximal 1/4–1/2 of plant heights, internodes mostly 5–25+ mm or 1–5(–35) mm
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Leaf lobes mostly linear to filiform, 5–25(–45+) × 0.5(–1) mm; cypselae 2–3 mm
|[[Thelesperma longipes|Thelesperma longipes]]
|-id=key-0-3
|3
|Leaf lobes mostly oblanceolate to linear, (5–)10–35(–45+) × (1–)2–3(–5) mm; cypselae 5–7 mm
|[[Thelesperma subnudum|Thelesperma subnudum]]
|-id=key-0-4
|4
|Perennials (sometimes flowering first year); calyculi of 3–5+, ovate to oblong bractlets 1–3 mm; ray florets 0, or 8, laminae 4–8(–12+) mm; cypselae (4–)5–8 mm
|[[#key-0-5| > 5]]
|-id=key-0-4
|4
|Annuals (sometimes persisting); calyculi of 5–9, linear to narrowly triangular bractlets (2–)4–8+ mm; ray florets 8, laminae 10–20+ mm; cypselae 3.5–5.5+ mm
|[[#key-0-6| > 6]]
|-id=key-0-5
|5
|Plants 10–30(–50) cm; ray florets usually 8, rarely 0; disc corollas red-brown
|[[Thelesperma ambiguum|Thelesperma ambiguum]]
|-id=key-0-5
|5
|Plants (20–)30–80+ cm; ray florets 0; disc corollas yellow
|[[Thelesperma megapotamicum|Thelesperma megapotamicum]]
|-id=key-0-6
|6
|Ray laminae proximally to wholly red-brown to purplish, or each with a proximal red-brown spot; disc corollas red-brown to purplish
|[[#key-0-7| > 7]]
|-id=key-0-6
|6
|Ray laminae yellow to golden (rarely proximally suffused with red-brown); disc corollas yellow or red-brown
|[[#key-0-8| > 8]]
|-id=key-0-7
|7
|Calyculi of 5–6(–9), linear to narrowly triangular bractlets (margins hispido-ciliate); cypselae 3.5–4 mm
|[[Thelesperma burridgeanum|Thelesperma burridgeanum]]
|-id=key-0-7
|7
|Calyculi of 6–7+, narrowly triangular bractlets (margins not ciliate); cypselae 5–5.5+ mm
|[[Thelesperma nuecense|Thelesperma nuecense]]
|-id=key-0-8
|8
|Plants 30–70(–120+) cm; cauline leaves ± scattered over proximal 9/10 of plant heights, internodes 35–100+ mm; disc corollas yellow, often with brown nerves
|[[Thelesperma flavodiscum|Thelesperma flavodiscum]]
|-id=key-0-8
|8
|Plants 10–40(–70+) cm; cauline leaves crowded to ± scattered over proximal 1/2–3/4+ of plant heights, internodes mostly 10–35(–50+ mm); disc corollas red-brown or yellow with red-brown nerves
|[[Thelesperma filifolium|Thelesperma filifolium]]
|}
</div></div><!--

-->{{#Taxon:
name=Thelesperma
|author=John L. Strother
|authority=Lessing
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=w North America;Mexico;South America.
|reference=greer1997a;hansen2002a
|publication title=Linnaea
|publication year=1831
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V21_490.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae
|genus=Thelesperma
}}<!--

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