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.
Eranthemum Eranthemum pulchellum ("Eranthemum nervosum", English: blue eranthemum, or blue sage) is a strongly branched shrub, popular with gardeners in tropical India and China because of the spikes of flowers that are bright gentian blue - an unusual color in the tropics. The flowers appear from green-and-white veined bracts that remain after the blooms fall, forming a column several inches long. The hairy leaves are large and dark green. A sprawling shrub which may reach a metre or more in height, "E. pulchellum" is usually kept lower and bushier through pruning. Light shade is preferred in a garden; in a greenhouse it needs warm conditions. It is easily propagated from cuttings. According to ITIS, "Eranthemum pulchellum" is the only species in the genus Eranthemum although The Plant List accepts 22 species.