The ans is - Poplar
What genus of about 70-75 species of flowering plants native to southern and eastern Asia and North and South America are mostly shrubs 1 to 3 metres tall, though some are small trees, and others are lianas reaching up to 30m by climbing trees?
Of which species of plant found on the floors of east Asian forests from eastern India, Indochina, China and Japan have 93 species been formally described, and, it is speculated, there may be 200 to 300?