Which of the following plants does not have pure white flowers? A: Michelia maudiae B: Magnolia grandiflora C: Yulania denudata D: Yulania × soulangeana

Which of the following plants does not have white flowers? A: Michelia chapensis Dandy B: Gardenia jasminoides C: Magnolia denudata Desr. D: Cerasus serrulata (Lindl.)

Refuse frost flower" is an alias of which of the following flower viewing trees？ A: White magnolia (Magnolia denudata) B: Albizia (Albizia julibrissin) C: Wintersweet (Chimonanthus praecox) D: Cotton rose (Hibiscus mutabilis)