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.
Tabernaemontana ventricosa Tabernaemontana ventricosa (commonly known as forest toad-tree or small-fruited toad-tree) is a plant in the family Apocynaceae. It grows as a shrub or small tree up to 15 m tall, with a trunk diameter of up to 30 cm . Its fragrant flowers feature white lobes with a pale yellow corolla. The fruit is dark green, with two ellipsoids, up to 10 cm in diameter. Its habitat is forests from sea-level to 1850 m altitude. Local medicinal uses include the treatment of wounds, fever and hypertension. The plant is native to tropical central and southern Africa.