InaLaburnum—treeIobservedthataboutafourthpartoftheracemesproducedterminalflowerswhichhadlosttheirpapilionaceousstructure。Thesewereproducedafteralmostalltheotherflowersonthesameracemeshadwithered。
Themostperfectlypelorisedexampleshadsixpetals，eachmarkedwithblackstriaelikethoseonthestandard—petal。Thekeelseemedtoresistthechangemorethantheotherpetals。Dutrochethasdescribed（26/18。’Memoires……desVegetaux’1837tome2page170。）anexactlysimilarcaseinFrance，andI
believethesearetheonlytwoinstancesofpelorisminthelaburnumwhichhavebeenrecorded。Dutrochetremarksthattheracemesonthistreedonotproperlyproduceaterminalflower，sothat（asinthecaseoftheGaleobdolon）theirpositionaswellasstructurearebothanomalies，whichnodoubtareinsomemannerrelated。Dr。Mastershasbrieflydescribedanotherleguminousplant（26/19。’JournalofHorticulture’July23，1861page311。），namely，aspeciesofclover，inwhichtheuppermostandcentralflowerswereregularorhadlosttheirpapilionaceousstructure。Insomeoftheseplantstheflower—headswerealsoproliferous。
Lastly，Linariaproducestwokindsofpeloricflowers，onehavingsimplepetals，andtheotherhavingthemallspurred。Thetwoforms，asNaudinremarks（26/20。’NouvellesArchivesduMuseum’tome1page137。），notrarelyoccuronthesameplant，butinthiscasethespurredformalmostinvariablystandsonthesummitofthespike。
Thetendencyintheterminalorcentralflowertobecomepeloricmorefrequentlythantheotherflowers，probablyresultsfrom\"thebudwhichstandsontheendofashootreceivingthemostsap;itgrowsoutintoastrongershootthanthosesituatedlowerdown。\"（26/21。HugovonMohl’TheVegetableCell’Englishtranslation1852page76。）Ihavediscussedtheconnectionbetweenpelorismandacentralposition，partlybecausesomefewplantsareknownnormallytoproduceaterminalflowerdifferentinstructurefromthelateralones;butchieflyonaccountofthefollowingcase，inwhichweseeatendencytovariabilityortoreversionconnectedwiththesameposition。A