The stems, leaves and pedicles of corn poppy (Papaver rhoeas) are coarser in texture than those of opium poppy (Papaver somniferum).

虞美人的拉丁名是（ ）。 A: Salvia splendens B: Celosia cristata C: Petunia hybrida D: Papaver rhoeas

Which of the plants is similar to opium poppy ？ A: Trifolium repens B: Papaver rhoeas C: Viola tricolor D: Nelumbo nucifera

Which of the plants can grow in the water environment？ A: Trifolium repens B: Papaver rhoeas C: Viola tricolor D: Nelumbo nucifera