In Jainism, the worship of Tirthankaras and deities is performed with great reverence, but the offering of flowers is generally discouraged. This is because plucking flowers causes himsa (violence) to living beings (plants and microorganisms), which goes against the core Jain principle of ahimsa (non-violence).

Instead of fresh flowers, Jains traditionally use the following items for worship:

1. Akshata (uncooked rice coated with sandalwood paste)
2. Dry, artificial, or paper flowers (if flowers are to be symbolically offered)
3. Scented powders like sandalwood and saffron
4. Abhisheka with pure water or milk

If, due to tradition or cultural reasons, symbolic flowers are offered, they are usually artificial or already fallen flowers to minimize himsa. Jain scriptures do not specify types of flowers to be offered, as the focus is on devotion and non-violence rather than material offerings.

In summary: Jainism discourages the offering of fresh flowers due to the principle of non-violence and does not prescribe specific types of flowers for offering to God.