The flower is a representation of himself, in the autumn of his life.
Explanation:
The poet William Carlos Williams used to write poems using flowers, the use of the daisy in this poem and how it is hugging the earth is himself in his mid life, after the thirties, going to the autumn of his life. The daisy is not erected, what suggests is not a strong young flower, but it is strong enough to hug the earth.
D since subjective means that opinions change from person to person. In other words, people that appear greedy to me may appear righteous to someone else.
