View source for Logfia

{{Treatment/ID
|accepted_name=Logfia
|accepted_authority=Cassini
|publications={{Treatment/Publication
|title=Bull. Sci. Soc. Philom. Paris
|place=1819: 143. 1819 (as “genre ou sous-genre”)
}}, {{Treatment/Publication
|title=in F. Cuvier, Dict. Sci. Nat. ed.
|place=2, 23: 564. 1822
|year=1822
}}
|common_names=Cottonrose;cotonnière;filzkraut;fluffweed;cottonweed
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Oglifa
|authority=(Cassini) Cassini
|rank=genus
}}
|hierarchy=Asteraceae;Asteraceae tribe Gnaphalieae;Logfia
|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>[[Logfia]]</div></div>
|etymology=anagram of generic name Filago
|volume=Volume 19
|mention_page=page 26, 28, 385, 386, 387, 444, 445, 448
|treatment_page=page 443
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> 1–50(–70) cm. <b>Stems</b> 1, erect, or 2–10+, ascending to prostrate. <b>Leaves</b> cauline; alternate; blades subulate to obovate. <b>Heads</b> usually in glomerules of 2–10(–14) in racemiform to paniculiform or dichasiiform arrays, or some [all] borne singly. <b>Involucres</b> 0 or inconspicuous. <b>Phyllaries</b> 0, vestigial, 1–4 (unequal), or 4–6 (equal). <b>Receptacles</b> fungiform to obovoid (heights 0.4–1.6 times diams.), glabrous. <b>Pistillate</b> paleae (except usually innermost) readily or tardily falling, erect to ascending; bodies with 5+ nerves (nerves ± parallel, obscure), lanceolate to ovate or boat-shaped, ± saccate most of lengths (obcompressed to terete, sometimes ± galeate, each ± enclosing a floret); wings erect to incurved (apices blunt). <b>Innermost</b> paleae usually all pistillate, in some species bisexual and pistillate, persistent, usually 5 or 8, spreading (and enlarged) in fruit, surpassing other pistillate paleae; bodies lanceolate to ovate. <b>Pistillate</b> florets 14–45+. <b>Functionally</b> staminate florets 0. <b>Bisexual</b> florets 2–10; corolla lobes 4–5, ± equal. <b>Cypselae</b> brown, dimorphic: outer compressed to obcompressed, obovoid to ± cylindric, straight or curved, longer than inner, abaxially gibbous, faces glabrous, smooth, shiny; inner ± terete, faces glabrous, usually papillate to muriculate, sometimes smooth, dull; corolla scars apical to subapical; pappi: outer pistillate 0, inner pistillate and bisexual of (11–)13–28+ bristles (visible in heads). <b>x</b> = 14.</span><!--

-->{{Treatment/Body
|distribution=North America;n Mexico;Europe;Asia;n Africa;introduced in South America;Pacific Islands;probably elsewhere.
|discussion=<p>Species 12 (6 in the flora).</p><!--
--><p>See discussion of Filagininae following the tribal description (p. 385).</p><!--
--><p><i>Logfia</i> occurs in dry open habitats of Mediterranean, semiarid, arid, and, sometimes, humid temperate climates. The three introduced species (<i>L. arvensis</i>, <i>L. gallica</i>, <i>L. minima</i>) do not appear to be aggressively invasive. <i>Logfia filaginoides</i> (formerly known as <i>Filago</i> californica) is somewhat weedy in the more mesic, coastal portions of its range, where it often mixes about equally with <i>L. gallica</i>. Some specimens of <i>L. filaginoides</i>, <i>L. depressa</i>, and <i>L. minima</i> may be difficult to identify without full comparison to descriptions.</p><!--
--><p>Usually included in <i>Filago</i> in North America, <i>Logfia</i> (including Oglifa) has been separated for some decades in Old World treatments. Contrary to G. Wagenitz (1969), I agree with J. Holub (1976, 1998) that the two genera warrant separation. Priority of <i>Logfia</i> over Oglifa at generic rank is ambiguous, however, depending on whether <i>Logfia</i> was validated in 1819 or 1822 (J. D. Morefield 2004). Because uncertainty remains, I here preserve current usage of <i>Logfia</i>, pending a proposal to conserve the name.</p><!--
--><p>Morphologic evidence suggests <i>Logfia</i> is basal in Filagininae, with ancestral, sister, and/or reticulate relationships to <i>Filago</i> and <i>Stylocline</i> (J. D. Morefield 1992). <i>Logfia depressa</i> appears to be transitional toward <i>Stylocline</i>. Ancestors of <i>Logfia</i> probably resembled <i>Gnaphalium palustre</i> Nuttall, which is frequently misidentified as a member of Filagininae. <i>Logfia</i> is most easily recognized by outer epappose florets subtended by saccate paleae, prominent pappi on inner pistillate and bisexual florets, and innermost paleae open, persistent, spreading.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Pistillate florets: inner (0–)1–2 pappose; branches usually leafless between proximal forks, becoming purplish to black, glabrescent (longest capitular leaves ± linear, 2–5 times head heights)
|[[Logfia arizonica|Logfia arizonica]]
|-id=key-0-1
|1
|Pistillate florets: inner (4–)8–35 pappose; branches ± leafy between proximal forks, remaining greenish to grayish or whitish, arachnoid-sericeous to lanuginose
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Pistillate paleae ± vertically ranked, outer inflexed 70–90° proximally, gibbous, ± galeate, bodies ± bony; leaves subulate or broader; phyllaries usually 5, equal
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Pistillate paleae spirally ranked, outer incurved 20–60°, somewhat gibbous, not galeate, bodies ± cartilaginous or chartaceous; leaves not subulate; phyllaries 0, vestigial, or 1–4, unequal
|[[#key-0-4| > 4]]
|-id=key-0-3
|3
|Leaves narrowly elliptic to narrowly ovate; longest capitular leaves 0.8–1.5 times head heights; innermost paleae ± 8, spreading in 2 series; bisexual corollas 1.6–2.1 mm; pappi mostly of 13–16 bristles falling in 1s or 2s
|[[Logfia minima|Logfia minima]]
|-id=key-0-3
|3
|Leaves mostly subulate; longest capitular leaves 2–5 times head heights; innermost paleae ± 5, spreading in 1 series; bisexual corollas 2.2–3 mm; pappi of 18–28+ bristles falling in complete or partial rings
|[[Logfia gallica|Logfia gallica]]
|-id=key-0-4
|4
|Outer pistillate paleae: distal 5–10% of lengths glabrous abaxially, wings obscured by indument; outer 2–4(–6) pistillate florets epappose; innermost paleae ± 8, spread- ing in 2 series
|[[Logfia arvensis|Logfia arvensis]]
|-id=key-0-4
|4
|Outer pistillate paleae: distal 15–50% of lengths glabrous abaxially; wings prominent; outer 7–13 pistillate florets epappose; innermost paleae ± 5, spreading in 1 series
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Outer pistillate paleae: bodies ± cartilaginous; bisexual corolla lobes mostly 4, bright reddish to purplish; inner cypselae mostly papillate, pappi of 17–23+ bristles falling in complete or partial rings; stems typically ± erect; capitular leaves mostly acute
|[[Logfia filaginoides|Logfia filaginoides]]
|-id=key-0-5
|5
|Outer pistillate paleae: bodies (except midnerves) chartaceous; bisexual corolla lobes mostly 5, yellowish to brownish; inner cypselae mostly smooth, pappi of 11–15 bristles falling in 1s or 2s; stems typically ± prostrate; capitular leaves obtuse
|[[Logfia depressa|Logfia depressa]]
|}
</div></div><!--

-->{{#Taxon:
name=Logfia
|author=James D. Morefield
|authority=Cassini
|rank=genus
|parent rank=tribe
|synonyms=Oglifa
|basionyms=
|family=Asteraceae
|illustrator=Linny Heagy
|illustration copyright=Flora of North America Association
|distribution=North America;n Mexico;Europe;Asia;n Africa;introduced in South America;Pacific Islands;probably elsewhere.
|reference=None
|publication title=Bull. Sci. Soc. Philom. Paris;in F. Cuvier, Dict. Sci. Nat. ed.
|publication year=;1822
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V19_734.xml
|tribe=Asteraceae tribe Gnaphalieae
|genus=Logfia
}}<!--

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