paulownia trees young and old

asteridae australis being bloom blossom botany branch carpatica catalpifolia china commercially coreana duclouxii ecology elongata environment fargesii farm fast floral flower fortunei garden glabrata grandifolia green growing grown growth hardwoods imperialis kawakamii leaves lilacina longifolia magnoliophyta magnoliopsida meridionalis mikado natural nature old ornamental paulovnia paulownia plant plantae plantation planting popular production purple recurva reforestation rehderiana scrophulariaceae scrophulariales season shensiensis silvestrii spring summer taiwaniana thyrsoidea tomentosa tree trees trunk viscosa young