What is the flower/plant that stands for: esteem but not love?

Questions

Geography : This country occupies the "horn of Africa".?

Geography : This country's flag has a large "R" on it.?

Geography : This imaginary line approximately follows the 180 degree meridian through the Pacific Ocean.?

Geography : This is called the "Honeymoon Capital" of the world.?

Geography : This is the bridge with the longest span in the U.S.A.?