View source for Jovibarba

{{Treatment/ID
|accepted_name=Jovibarba
|accepted_authority=(de Candolle) Opiz
|publications={{Treatment/Publication
|title=Seznam,
|place=54. 1852 ,
}}
|common_names=Hen-and-chickens or;chicks
|basionyms=
|synonyms=
|hierarchy=Crassulaceae;Jovibarba
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Crassulaceae]]</div><div class="higher-taxon"><small>genus</small>[[Jovibarba]]</div></div>
|etymology=Latin Jovis, Jupiter, and barba, beard, alluding to fringed petals
|volume=Volume 8
|mention_page=page 147, 149
|treatment_page=page 170
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, monocarpic, not viviparous, 0.8–2.5 dm, glabrous. <b>Stems</b> erect, (compressed), not branched, succulent. <b>Leaves</b> persistent, forming basal rosette, alternate, sessile, not connate basally; blade oblong to obovate, laminar, 2–4(–6) cm, succulent, base not spurred, margins entire, sometimes ciliate; veins not conspicuous. <b>Inflorescences</b> terminal cymes. <b>Pedicels</b> absent or to 1 mm. <b>Flowers</b> erect, 6–7-merous; sepals connate basally, all alike; petals erect, distinct, greenish white or greenish yellow to yellow, margins fimbrillate; calyx and corolla not circumscissile in fruit; nectary disc quadrate; stamens 2 times as many as sepals; filaments not adnate to petals; pistils erect, connate; ovary base rounded; styles 4–5 times shorter than ovary. <b>Fruits</b> capsular, erect, composed of basally connate pistils. <b>Seeds</b> (brown), ellipsoid, ribbed. <b>x</b> = 19.</span><!--

-->{{Treatment/Body
|distribution=Wis.;Europe;Asia.
|introduced=true
|discussion=<p><i>Sempervivum</i> Linnaeus sect. <i>Jovibarba</i> de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 3: 413. 1828</p><!--
--><p>Species 3 (1 in the flora).</p><!--
--><p>Segregation of <i>Jovibarba</i> from <i>Sempervivum</i> has been problematic and uncertain for over a century. The uncertainty has centered upon whether <i>Jovibarba</i> should be treated as a section of <i>Sempervivum</i> or as a genus. Recent work has shown that the two are closely related (M. E. Mort et al. 2001). J. Parnell and C. Favarger (1992) maintained <i>Jovibarba</i> at the generic level; H. ’t Hart et al. (2003) treated it at sectional rank within <i>Sempervivum</i>. R. C. H. J. van Ham and ’t Hart (1998) did not include any accessions of <i>Jovibarba</i> in their study of the Crassulaceae using chloroplast DNA.</p><!--
--><p>Taxa assigned to <i>Jovibarba</i> generally have been segregated from <i>Sempervivum</i> based on: (1) the erect petals in <i>Jovibarba</i> versus reflexed petals in <i>Sempervivum</i>; (2) 6(–7)-merous flowers in <i>Jovibarba</i> versus 8–16-merous flowers in <i>Sempervivum</i>; (3) fimbrillate petals in <i>Jovibarba</i> versus entire petals in <i>Sempervivum</i>. J. Parnell (1991) examined pollen morphology and ultrastructure and found significant differences between <i>Jovibarba</i> and <i>Sempervivum</i> and concluded that these palynological differences supported retention of <i>Jovibarba</i> at the generic level. H. ’t Hart et al. (2003) discussed their decision to submerge <i>Jovibarba</i> into <i>Sempervivum</i> and discounted the floral morphology differences as being insignificant relative to similarities. They did not discuss, or cite, the palynological differences presented by Parnell, which are congruent with the character-state differences in floral morphology, and support segregation of <i>Jovibarba</i> from <i>Sempervivum</i>.</p>
|tables=
|references=
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-->{{#Taxon:
name=Jovibarba
|author=Richard A. Lis
|authority=(de Candolle) Opiz
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Crassulaceae
|distribution=Wis.;Europe;Asia.
|introduced=true
|reference=None
|publication title=Seznam,
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V8/V8_342.xml
|genus=Jovibarba
}}<!--

-->[[Category:Treatment]][[Category:Crassulaceae]]