Are both Nerium or Thuja could be a shrub?
Nerium Nerium oleander is a shrub or small tree in the dogbane family Apocynaceae, toxic in all its parts. It is the only species currently classified in the genus Nerium. It is most commonly known as nerium or oleander, from its superficial resemblance to the unrelated olive "Olea". It is so widely cultivated that no precise region of origin has been identified, though southwest Asia has been suggested. The ancient city of Volubilis in Morocco may have taken its name from the Berber name "oualilt" for the flower. Oleander is one of the most poisonous commonly grown garden plants.
Strophanthus amboensis Strophanthus amboensis grows as a deciduous shrub up to 4 m tall, or as a liana up to 20 m long, with a stem diameter up to 20 cm . Its flowers feature an orange-yellow turning purple corolla tube, white-streaked on the inside. Habitats are forest margins, scrubland or rock fissures, from 450 m to 2000 m altitude. "S. amboensis" is used in local medicinal treatments for rheumatism, venereal diseases and scabies. The plant has been used as arrow poison. "Strophanthus amboensis" is native to Democratic Republic of Congo, Angola and Namibia.