Boyd’s Bible Dictionary:

(ruddy). Disputed translation. Some say narcissus is meant; others would simply read “flower” for “rose” (Song of Sol. 2:1; Isa. 35:1).

Concise Bible Dictionary:

The bride in the Song of Solomon calls herself a “rose of Sharon”; and when God again brings the Jews into blessing “the desert shall rejoice and blossom as the rose” (Song of Sol. 2:1; Isa. 35:1). Roses grow in Palestine, but it is generally agreed that the above Hebrew word does not refer to the rose, but implies a bulbous plant, and it may be the lily, the crocus, or the narcissus. The RV has in the margin the “autumn crocus.”