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.
Kalmia procumbens Kalmia procumbens, commonly known as alpine azalea or trailing azalea, is a dwarf shrub of high mountain regions of the Northern Hemisphere that usually grows no more than 10 cm tall. Originally named by Linnaeus as "Azalea procumbens", it is also named after French botanist L.L.A. Loiseleur-Deslongchamps - "Loiseleuria procumbens".