View source for Stylocline

{{Treatment/ID
|accepted_name=Stylocline
|accepted_authority=Nuttall
|publications={{Treatment/Publication
|title=Trans. Amer. Philos. Soc., n. s.
|place=7: 338. 1840
|year=1840
}}
|common_names=Neststraw
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Gnaphalieae;Stylocline
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Gnaphalieae]]</div><div class="higher-taxon"><small>genus</small>[[Stylocline]]</div></div>
|etymology=Greek stylos, column, pillar, or pole, and cline, couch or bed (or gyne, female, specified by Nuttall in protologue), alluding to narrowly cylindric receptacles of the type species
|volume=Volume 19
|mention_page=page 26, 27, 386, 388, 444, 453, 454, 455
|treatment_page=page 450
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> 1–10(–20) cm. <b>Stems</b> 1, ± erect, or 2–10+, ascending to ± prostrate. <b>Leaves</b> cauline; mostly alternate; blades oblanceolate to lanceolate or broader. <b>Heads</b> in glomerules of 2–10 (rarely borne singly) in ± dichasiform (sometimes ± paniculiform) arrays. <b>Involucres</b> 0 or inconspicuous. <b>Phyllaries</b> 0, vestigial, or 1–4, unequal or subequal (similar to paleae). <b>Receptacles</b> cylindric to clavate (heights 2.8–8 times diams.), glabrous. <b>Pistillate</b> paleae falling, erect to ascending; bodies with 5+ nerves (nerves ± parallel, obscure), ± ovate or boat-shaped, saccate most of lengths (obcompressed to terete, not galeate, each usually enclosing a floret, outermost open in 2 spp.); wings ± erect (apical). <b>Staminate</b> paleae readily falling, mostly 2–4, erect in fruit (not enlarged), shorter than pistillate paleae; bodies linear-lanceolate to oblanceolate. <b>Pistillate</b> florets 12–25+. <b>Functionally</b> staminate florets 2–6; corolla lobes (4–)5, ± equal. <b>Bisexual</b> florets 0. <b>Cypselae</b> brown, monomorphic: compressed to obcompressed, ± obovoid, slightly incurved, abaxially gibbous, faces glabrous, smooth, shiny; corolla scars subapical; pappi: pistillate 0, staminate rarely 0, usually of 1–10(–13) bristles (hidden in heads). <b>x</b> = 14.</span><!--

-->{{Treatment/Body
|distribution=sw United States;nw Mexico.
|discussion=<p>Species 7 (7 in the flora).</p><!--
--><p>See discussion of Filagininae following the tribal description (p. 385).</p><!--
--><p><i>Stylocline</i> occurs in Mediterranean, desert, and semi-desert climates; most species appear only after exceptionally wet winters, or in moisture-accumulating microsites (e.g., rock bases, washes, shrub drip-lines). Plants usually grow in undisturbed soils (often with soil crusts) and sometimes colonize stabilized disturbances.</p><!--
--><p>In some species of <i>Stylocline</i>, the outermost bracts of heads are merely concave, not saccate; these are paleae (if they subtend and fall with florets) or phyllaries (if they persist and subtend only adjacent saccate paleae). Texture of the palea bodies is diagnostic for each species. In dried specimens, chartaceous bodies tear easily and irregularly when the abaxial indument is gently scraped. Cartilaginous bodies can be scraped clean without tearing and split lengthwise only if forced.</p><!--
--><p><i>Stylocline</i> appears to be ancestral to <i>Micropus</i> and <i>Psilocarphus</i>, and derived from, sister to, and/or reticulate with <i>Logfia</i> (J. D. Morefield 1992). <i>Stylocline citroleum</i>, <i>S. sonorensis</i>, and <i>L. depressa</i> show some transitional traits between the genera.</p>
|tables=
|references={{Treatment/Reference
|id=morefield1992a
|text=Morefield, J. D. 1992. Evolution and Systematics of Stylocline (Asteraceae: Inuleae). Ph.D. dissertation. Claremont Graduate School. California.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Longest pistillate paleae winged proximally and distally, wings widest in proximal 2/3 of palea lengths; phyllaries ± persistent, elliptic or broader, 1–3.5 mm
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Longest pistillate paleae winged distally, wings widest in distal 1/3 of palea lengths; phyllaries 0, vestigial, or falling, ± subulate, mostly 0.1–0.5 mm
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Longest pistillate paleae: wings broadly ovate (bases rounded or cordate); staminate ovaries vestigial, 0–0.2 mm, pappi usually of 1–5 bristles; heads arachnoid to thinly lanuginose (often shiny, indument obscured by palea wings)
|[[Stylocline gnaphaloides|Stylocline gnaphaloides]]
|-id=key-0-2
|2
|Longest pistillate paleae: wings elliptic to slightly obovate (bases acute); staminate ovaries partially developed, (0.2–)0.3–0.6 mm, pappi of (5–)6–12(–13) bristles; heads thickly lanuginose (dull, indument evident)
|[[Stylocline citroleum|Stylocline citroleum]]
|-id=key-0-3
|3
|Receptacles clavate, heights 2.8–3.5 times diams.; staminate ovaries partially developed, 0.3–0.6 mm (cypselae 0.6–0.8 mm; heads ± spheric, diams. 3–4 mm; longest pistillate paleae 1.9–3.1 mm; proximal leaves blunt)
|[[Stylocline sonorensis|Stylocline sonorensis]]
|-id=key-0-3
|3
|Receptacles ± cylindric, heights 4–8 times diams.; staminate ovaries ± vestigial, 0–0.3(–0.4) mm (cypselae 0.8–1.6 mm, heads ovoid to ellipsoid or diams. 5–9 mm, longest pistillate paleae 3.4–4.5 mm and/or proximal leaves acute)
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Heads ± spheric, thickly lanuginose, largest diams. 5–9 mm; pistillate paleae: longest 3.4–4.5 mm, outermost saccate
|[[#key-0-5| > 5]]
|-id=key-0-4
|4
|Heads ovoid to ellipsoid, thinly lanuginose, largest diams. 1.5–4 mm; pistillate paleae: longest 2–3.3 mm, outermost open, concave
|[[#key-0-6| > 6]]
|-id=key-0-5
|5
|Bodies of longest pistillate paleae (except midnerves) chartaceous; cypselae compressed; largest capitular leaves (some or all) subulate to lanceolate (widest in proximal 1/3), (7–)11–17 mm (distalmost mainly 1.5–2 times head heights)
|[[Stylocline micropoides|Stylocline micropoides]]
|-id=key-0-5
|5
|Bodies of longest pistillate paleae cartilaginous; cypselae obcompressed; largest capitular leaves (all) ± elliptic to ± oblanceolate (widest in distal 2/3), 4–11 mm (distalmost mainly 0.8–1.2 times head heights)
|[[Stylocline intertexta|Stylocline intertexta]]
|-id=key-0-6
|6
|Heads 2.5–4 mm diam.; longest pistillate paleae 2.8–3.3 mm; cypselae 1.1–1.6 mm; staminate corollas 1.1–1.7 mm (lobes usually 5); leaves ± acute
|[[Stylocline psilocarphoides|Stylocline psilocarphoides]]
|-id=key-0-6
|6
|Heads 1.5–2.5 mm diam.; longest pistillate paleae 2–2.7 mm; cypselae 0.7–1 mm; staminate corollas 0.8–1.1 mm (lobes usually 4); leaves blunt
|[[Stylocline masonii|Stylocline masonii]]
|}
</div></div><!--

-->{{#Taxon:
name=Stylocline
|author=James D. Morefield
|authority=Nuttall
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Linny Heagy
|illustration copyright=Flora of North America Association
|distribution=sw United States;nw Mexico.
|reference=morefield1992a
|publication title=Trans. Amer. Philos. Soc., n. s.
|publication year=1840
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V19-20-21/V19_745.xml
|tribe=Asteraceae tribe Gnaphalieae
|genus=Stylocline
}}<!--

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