from: Universala Vortaro, Zamenhof
betul' bouleau birch (tree) Birke береза brzoza
betula + + 
birchen + + betulacoj + + birches + + betularo + + birch forest + + birch grove betulejo + + birch forest + + birch grove betulo + + birch (tree) + + #betula #birchen #betulacoj #birches #betularo #birch forest #betulejo #birch forest #betulo #birch (tree)
#betularbo #桦树 桦 白桦 白桦树 #betulo #白桦 白桦树 桦 桦树
