Are both Nerium or Thuja could be a shrub?
Thuja Thuja ( ) is a genus of coniferous trees in the Cupressaceae (cypress family). There are five species in the genus, two native to North America and three native to eastern Asia. The genus is monophyletic and sister to "Thujopsis". Members are commonly known as arborvitaes, (from Latin for "tree of life") thujas or cedars.
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.