I am a rose of Sharon, a lily of the valleys.
Sharon is a region between Tabor and the Sea of Galilee (11) page 40
This was near where Jesus grew up in northern Galliee (I Chronicles 5:16)
She is comparing herself to the rose of Sharon which is a common meadow flower that appears by the thousands, the same goes for the lily of the valley (12) page 5
I have gone into this matter at some length because the issue is not merely a philological argument; it determines how one envisions the young woman in the Song. Often pietistic and patriarchal, the commentators have desired a chaste and modest maiden. This image works if one compares her to one of the modest spring flowers that grow in thousands on the Plain of Sharon, and to the purity of the lily. But the speaker has more self-confidence than the patriarchal interpreters would like. She does not identify herself as one among thousands or as a modest little flower but as a lotus of the plains, embodying its characteristics. …… What a woman in an ancient Egyptian love song calls her beloved “my lotus” or when the woman here calls herself a lotus flower, it means they are able and willing to bestow renewed power –“Love’s sweet breath—a new-born life.” (29) pages 78, 80
Like a lily among thorns is my darling among the maidens.
Solomon takes the comparison and turns it to say that if she is like a lily, all the rest of the girls are like thorns. That she stands out far above anyone else.
The word translated “thorns” is not the thorn of a flower stem such as the rose, but refers to the thorn plant or thorn bushes which are plentiful. (24) page 19
NOW SHE IS ALONE – NOTE THE TENSE CHANGE —
Like an apple tree among the trees of the forest is my lover among the young men. The apple tree was frequently used as a symbol in the Near East for sexual love. (13) page 10
She is saying that he is very desirable in a sexual way. He is special among the young men, and is very attached to him.
I delight to sit in his shade, and his fruit is sweet to my taste.