Eucommiaceae , family of dicotyledonous flowering plants comprising the single species Eucommia ulmoides in the order Garryales . (britannica.com ) Eucommia is the only genus of the family Eucommiaceae , and was formerly considered to be a separate order , the Eucommiales. (wikipedia.org )The fossil record of Eucommia (Eucommiaceae) in North America. (wikipedia.org ) Ebenaceae (Persimmon family ) Diospyros, Persimmon Ericaceae (Heath family ) Arbutus, Arbutus Eucommiaceae (Eucommia family ) Eucommia ulmoides, Eucommia Fabaceae (Pea family ) Acacia , Acacia Caesalpinia, Brazilwood etc. (wikipedia.org )Deng JY, Liu YF, Huang HW (2006) Development and characterization of microsatellite markers in Eucommia ulmoides Oliver (Eucommiaceae). (springer.com ) Eucommia ulmoides Oliver, a single extant species of Eucommiaceae , is an endemic dioecious tree in China . (geneticsmr.com )Aucubin is found in the leaves of Aucuba japonica (Cornaceae), Eucommia ulmoides (Eucommiaceae), and Plantago asiatic (Plantaginaceae), etc, plants used in traditional Chinese and folk medicine. (selfdecode.com ) http://en.wikipedia.org/wiki/List_of_sequenced_plant_genomes ), and of these, more than ten concern tree species . (springer.com )