What type of category does Echium and Oxydendrum have in common?
Echium Echium is a genus of 60 species of flowering plant in the family Boraginaceae.
Epidendrum ruizianum Epidendrum ruizianum is an epiphytic reed-stemmed "Epidendrum" of the orchid family native to the cloud forests of Bolivia (including Cochabamba and La Paz), Colombia, Ecuador, Peru, and Venezuela, at altitudes of 2-3 km.