Do not use champaka flowers to worship Lord Shiva
Even Champaka flower also should not be used for Shiva Puja.
The story is :
In the land of Gokarna there was a temple dedicated to Shiva. Narada decided that he would go and visit the temple. On the way, he saw a flowering champaka tree and stopped to admire it. A brahmana came there to pluck flowers from the tree. But seeing that Narada was there, the brahmana refrained from plucking any flowers.
Where are you going? asked Narada.
