lôO l\- CdM'KliKNCK IMI.IIWTKiWI.I. ItK (,i;\i;i Kjl K 



MOSAIC HEREDITY 



'V\h' lirrc<Hti'' en iiiii^Kiqiif is llir |)iirl inihir \\;i\ iif licrc(lil;ii-\ I i':uiMi)issii)ii 

 wilicli Iraiislalos ilscll' liy llie juxlaposilinii uT llic ii;ii-ctil> corrcsiioïKliiii;- clia- 

 raclcrs on llu; cliild. 



Discovcri'il antl sludicil li\ Ciimii.is Nmdin ri(jni |N">1' to iNCiô il iiicliidcs 

 suiiie lypical exampics, Iruiii wliicli llic hyln-id (tiigin is siriclly eslalilislicd 

 [Dahira slrumuniu- lacvln, Linaria purjuiruo-ciilyaris. Mirabilis lungipum- 

 Jotapa) and M. Bt.A[iiNGni;M add many cases lo them examinalcd in ]iarlioMlar 

 in lliis noli' (sonic liylifids hclwcen llurdrinii ili>il_irliiiiii iiuiaux and U .(lisli<-liiiiii 

 rrrrlinii, ii("h\('CM Uunlru m iliMirhinn and //. Irl.ioxhr/ii/in: l'irus ISrll rrriaiia . 

 sicril liyl)rid bcLwciMi Pin/n and .S(////».s). 



l'Iie presuniah' soxual liybrids, as llio <'ijli^//!< Ailami. ('rahrijni/n-x/tiliix D'ir- 

 '/«)'/ and Asnieri'sii, Uic Orangc-lrces Bizorriu. Ilic aiinond-iH-acli Ircc ami so 

 on, wliose origin is badly i<no\vn, can gel in. 



LasL, Ihc vegolal cliimei-ys, roaiised Jjy M. II. W'inklcu, helwecii ^ulaninn 

 and Li/ro/ii'rsirurn. M. L. Uamel's gral'l liybrids, are l'ollowing llie rnles of i>ar- 

 lii'ulalc inlicrilanci'. and sonic niulalion^, as llic l'i'hirgijniuKt zonale willi ils 

 li'a\cs Iiuideii'd willi wliilc. and a fcw oiiuM' sleaUs parlially lieredilary, can 

 lu' joined. 



In al! Ilicse cases, lin- inilividual is a conipoiiud of loxlurc hclonging lo Iwo 

 dilTerent species llial niighl be recognised to a certain agc, at Ihcirsiiape, Iheir 

 coloiir, thcir parlicnlar mode of growtli and slrngling ail llie lime to disen- 

 gage Iheniselves froni each ollici-, H is a lirini/ mosaïc composed wilh discor- 

 dant spécifie éléments slrailly mixed in liic beginning ol" the life, bnt Irying to 

 disjoin tliemselves, lo localize tliemselves on the dillerenls paris, willi Ihc lime. 

 'J'his localisalion is helpcd l)y pruiiing, by sUimps divisions, by repealed cutl- 

 ings; it accentuâtes when approacliing the lime of flowering, ol' the formalion 

 of Ihe ovuls and the pollens corns; tint, in llie niean lime, il is noi uecessary 

 complète. 



The /œ redite en mosaù/iie. called slill hi'-rrdilr naiidiitirnnr is submitlcd lo 

 Iwo rnles : 



1" The ///'S/ Injbrid (jrnrraiiini's F, iniifariiiili/ : 



i!" Tiie rclurn to Ihc species l'roni Ihc second gtMicralion. and somelinies 

 cvcr since the lirst génération. 



Thèse; ruies arc intendcd l'or Ihc coniplicaUnl iiybrids, iiclwcen \rr\ di\ii- 

 genl species, wilh partiy untrnilfnl descendance. — whalesci- \\\v scxnal afli- 

 nily of the crossed l'omis might be, thaï the possibilily ol'gron|)ing ail divcr- 

 genl characlers of the parents by couples, thaï dominance and recessivity exist 

 or nol. The hérédité naudiiiienne, restricled by less conditions than llie héré- 

 dité mendélienne, is governcd nol by rigorous laws as Ihis one, bul by ruies; 

 aad il can bc secn Ihal il conlains Ihc jiérédilé mciidclienne as a parlicn- 

 lar case. 



Nauuin bas recognised, since IH03, the possible relurii lo Ihc ])arcnls of Ihe 

 hybrid.s, from Ihc second generalion. 1\Ieni>i:l. in ISIi,"i, niadc Ihc sanic disco- 



