Who is She?

She weeps tears of dew; Her humble boughs sigh. Wind becomes her grace, And the sun her hope. She shields clouds of rain; Veils her heart in leaves. Weather won't weaken, Her roots sink to deep. She in still, dances; Others stay rigid. Blossoms gold in spring; Yellow blaze in death. She returns a queen; A lofty castle, With many a wing. Waving hill of grass.