▁post hum ously ▁published ▁in ▁three ▁parts ▁( 1 9 6 4 – 1 9 6 8 ). ▁In ▁this ▁fl ora ▁about ▁ 6 , 1 0 0 ▁species ▁of ▁flow ering ▁plants ▁were ▁described .. ▁ ▁Hon ours ▁ ▁Honor ary ▁degree ▁ ▁In ▁ 1 9 3 6 ▁the ▁U tre cht ▁University ▁on ▁the ▁nom ination ▁by ▁the ▁U tre cht ▁Prof ess ors ▁Victor ▁Jacob ▁Kon ings berger ▁( 1 8 9 5 – 1 9 6 6 ) ▁and ▁August ▁Ad ria an ▁P ulle ▁( 1 8 7 8 – 1 9 5 5 ) ▁at ▁the ▁event ▁of ▁the ▁ 3 0 0 th ▁anni versary ▁con ferred ▁on ▁him ▁the ▁honor ary ▁degree ▁of ▁Doctor ▁of ▁Science ▁because ▁of ▁his ▁botan ical ▁achiev ements . ▁ ▁Pl ants ▁named ▁after ▁Back er ▁ ▁The ▁genus ▁Back eria ▁( M el ast om ata ceae ) ▁was ▁named ▁after ▁Back er ▁in ▁ 1 9 4 3 ▁by ▁Rein ier ▁Corn el is ▁Bak hu izen ▁van ▁den ▁Br ink ▁Jr . ▁ ▁The ▁following ▁species ▁have ▁been ▁named ▁after ▁Back er ▁through ▁the ▁specific ▁name ▁back eri ): ▁ ▁Cer at ost yl is ▁back eri ▁— ▁Johannes ▁Jacob us ▁Smith ▁ 1 9 1 3 ▁ ▁D ry opter is ▁back eri ▁— ▁Corn el is ▁R ug ier ▁Wille m ▁K arel ▁van ▁Ald er wer elt ▁van ▁Rosen burgh ▁ 1 9 0 8 ▁ ▁El at ost ema ▁back eri