At its heart, this is an address to something beautiful and ungraspable—a woman, a spirit, or a moment of perception that flutters just beyond the speaker’s understanding. That distance defines the whole feeling of the piece.
The speaker doesn’t demand her presence; he offers gifts. A white orchid, wild berries, long green canes—these are fragile, natural things, as if he hopes to match her delicacy. There is tenderness in this, but also longing and a quiet ache. The repeated image of fluttering and quivering gives the poem a hushed, dreamlike texture, like watching something through water or mist. The speaker is clearly devoted, yet he never quite reaches her, and that is exactly what makes her seem so full of wonder.