Answer:
The appositive phrases that I could find in this passage are:
1. Sentence 1: "three daughters and a son."
2. Sentence 2: "Lilly"
3. Sentence 3: "her best friend"
4. Sentence 4: " a creative couple"
5. Sentence 5: "the florist’s favorite flower"
6. Sentence 10: "a future biologist"
7. Sentence 11: "a son"
8. Sentence 14: "a cactus"
9. Sentence 15: "Saguaro"
10. Sentence 16: "youngest of the florist’s children"
Explanation:
Basically, an appositive phrase is a fancy way of giving more information in a sentence. So if I were to make the sentence "Her pet dog was sick" into an appositive phrase, I could add "Her pet dog, <u><em>Kevin</em></u>, was sick"
Some examples (I've underlined the appositive phrases.)
Jenna, <u>an expert at computers</u>, was able to do it.
Her friend's daughter, <u>Stacy</u>, had brown eyes.
She's a lot like Artemis, <u>the Greek goddess of hunting</u>.
I hope that made sense, best of luck :)