"There is a willow grows aslant a brook, that shows his hoar leaves in the glassy stream;" I could see through Ophelia's eyes as Gertrude spoke. The tree is a place she can hang from. If she can get away from it all perhaps her clouded mind will clear, and everything will be okay again.
"There with fantastic garlands did she come of crow-flowers, nettles, daisies, and long purples" Her brother had mentioned flowers, violets that were beautiful for now but would fade with time. They withered when her father died, but perhaps surrounding herself with others she can bring back what she lost. She climbs higher in the tree with her flowers safely tucked in her hair.
"That liberal shepherds give a grosser name, but our cold maids do dead men's fingers call them:" She climbs higher still, but the pain does not fade. Her mind clears and reality sets in. Perhaps a memory of her father scolding her for climbing when she was younger, or a day spent in a field with Hamlet passes through her mind. She leans over the water and something inside of her gives up.
"There, on the pendent boughs her coronet weeds clambering to hang, an envious sliver broke; when down her weedy trophies and herself fell in the weeping brook." She lets go, and feels herself fall. In that time she is no longer mad. She just wants it to end.
"Her clothes spread wide; And, mermaid-like, awhile they bore her up: Which time she chanted snatches of old tunes; As one incapable of her own distress, Or like a creature native and indued unto that element:" She hits the water and comes back up. Gasping she lays back and floats. She sings to herself about simpler times. It could be an old lullaby, or a song about finding true love. She does not have long, but she stares at the sky before she begins to sink.
"But long it could not be till that her garments, heavy with their drink, pull'd the poor wretch from her melodious lay" As she sinks she looks for one last memory to take with her, a sign that this life was not entirely unworthy living. The water covers over her, and though her lungs begin to scream for air she does not fight. Just before she closes her eyes, she sees a violet floating above her.
"To muddy death."