▁green ▁trees ▁have ▁a ▁few ▁normal ▁cells ▁( wh ose ▁abund ance ▁may ▁vary ▁over ▁time ) ▁inter sp ers ed ▁among ▁the ▁mut ant ▁cells . ▁ ▁Ten ▁cases ▁are ▁known ▁of ▁ch imer ic ▁red wood s ▁that ▁have ▁a ▁m osa ic ▁of ▁alb ino ▁and ▁normal ▁t issues . ▁Only ▁a ▁single ▁ch imer ic ▁red wood ▁is ▁known ▁to ▁produce ▁con es . ▁Form er ly ▁threatened ▁by ▁the ▁Son oma – Mar in ▁Area ▁Rail ▁Trans it ▁rail ▁development , ▁it ▁has ▁since ▁been ▁re pl anted . ▁ ▁Three ▁phen ot ypes ▁of ▁ch imer ic ▁red wood s ▁have ▁been ▁noted : ▁sector ial , ▁mer ic l inal ▁and ▁per ic l inal . ▁In ▁sector ial ▁mut ants , ▁alb ino ▁cells ▁are ▁present ▁vert ically ▁through ▁all ▁cell ▁layers , ▁with ▁gen ot ype ▁boundaries ▁usually ▁parallel ▁to ▁the ▁stem . ▁Mer ic l inal ▁trees ▁have ▁mut ant ▁cells ▁in ▁only ▁some ▁cell ▁layers ▁and ▁have ▁an ▁un stable ▁phen ot ype ; ▁the ▁alb ino ▁cells ▁can ▁disappear ▁and ▁re app ear ▁in ▁success ive ▁years . ▁A ▁per ic l inal ▁chim era ▁has ▁both ▁mut ant ▁and ▁normal ▁cells ▁distributed ▁hor izont ally ▁across ▁the ▁tip ▁of ▁each ▁bud ▁propag ating ▁at ▁equal ▁rates , ▁leading ▁to ▁a ▁very ▁stable ▁phen ot ype . ▁ ▁Notes ▁ ▁References ▁ ▁External ▁links ▁Ch im era ▁Red wood s ▁web ▁site ▁ ▁Category : Al bin ism ▁Category : Sequ