While there is no single flower that represents depression, there are some flowers that are commonly associated with sadness, grief, or mourning. These flowers are often chosen for funerals or other somber occasions.

One flower that is often associated with sadness and grief is the lily. White lilies, in particular, are often used in funeral arrangements as a symbol of purity and innocence. In some cultures, the lily is also associated with rebirth or the afterlife.
Another flower that is commonly associated with grief is the chrysanthemum. In many Asian cultures, white chrysanthemums are used for funerals and are associated with death and mourning. In some Western cultures, however, chrysanthemums are more commonly associated with joy and celebration.
The forget-me-not is another flower that is sometimes associated with sadness or loss. As the name suggests, forget-me-nots are often used as a symbol of remembrance or to show that the memory of a loved one will never be forgotten.
The black rose is also sometimes associated with sadness or grief, although it is a less common symbol than the others mentioned above. Black roses are sometimes used in funeral arrangements or as a way to express feelings of deep sorrow or loss.
It is important to note, however, that flowers are not the only way to express or symbolize feelings of depression or sadness. Mental health is a complex issue that can’t be reduced to a single symbol or gesture. If you or someone you know is struggling with depression, it is important to seek professional help from a qualified healthcare provider. There are many effective treatments available for depression, including therapy, medication, and other forms of support.