باقة الزهور بين هدية الزفاف وكعكة الزفاف.

In Arabic, the present-tense verb to be is usually not stated.

So:

باقة الزهور بين هدية الزفاف وكعكة الزفاف
literally looks like: the flower bouquet between the wedding gift and the wedding cake

But the natural English meaning is:

The flower bouquet is between the wedding gift and the wedding cake.

If you wanted was, will be, etc., Arabic would normally use an actual verb such as كان.

It is an iḍāfa construction (الإضافة), often translated as an X of Y structure.

So:

• باقة = bouquet / bunch
• الزهور = the flowers

Together:

• باقة الزهور = bouquet of flowers / flower bouquet

This is one of the most common noun patterns in Arabic.

Because in an iḍāfa construction, the first noun normally does not take ال.

So Arabic says:

• باقة الزهور

not:

• الباقة الزهور

The definiteness comes from the second noun:

• الزهور is definite
• therefore the whole phrase باقة الزهور becomes definite: the bouquet of flowers

This is a very important Arabic rule.

For the same reason: these are also iḍāfa phrases.

• هدية الزفاف = the wedding gift
• كعكة الزفاف = the wedding cake

In iḍāfa:

• the first noun does not take الـ
• the second noun makes the whole phrase definite if it is definite

So:

• هدية الزفاف is correct
• الهدية الزفاف is not the normal iḍāfa form

Because Arabic is linking two separate noun phrases:

• هدية الزفاف = the wedding gift
• كعكة الزفاف = the wedding cake

So the sentence literally has:

between [the wedding gift] and [the wedding cake]

Repeating الزفاف keeps each phrase complete and clear.

English sometimes avoids repetition more easily, but Arabic often keeps it.

بين means between, and it is a preposition.

That means the noun after it is in the genitive case.

With full case endings, this part would be:

• بينَ هديةِ الزفافِ وكعكةِ الزفافِ

So after بين:

• هديةِ is genitive
• كعكةِ is also genitive

And inside each iḍāfa, الزفافِ is genitive as well.

In normal everyday writing, these short vowel endings are usually omitted.

It is a nominal sentence.

You can think of it as:

• باقة الزهور = the topic / subject
• بين هدية الزفاف وكعكة الزفاف = the predicate / comment about it

So the structure is basically:

[The bouquet of flowers] [is between the wedding gift and the wedding cake].

Arabic often uses this kind of noun + prepositional phrase structure instead of a verb like is.

A fully vocalized version would be:

باقَةُ الزُّهُورِ بَيْنَ هَدِيَّةِ الزِّفَافِ وَكَعْكَةِ الزِّفَافِ.

A helpful transliteration is:

bāqatu z-zuhūri bayna hadiyyati z-zifāfi wa-kaʿkati z-zifāfi

A few pronunciation notes:

• الـ before ز is pronounced with assimilation, so الزهور sounds like az-zuhūr
• كعكة contains ع, which has no exact English equivalent

It is plural.

• زهرة = flower
• زهور = flowers

So باقة الزهور literally means a bouquet of flowers, not a bouquet of a flower.

That matches normal usage in English too.

باقة is a feminine noun. You can often tell because of the ـة ending.

Yes, that matters for agreement later.
If you described it with an adjective, the adjective would usually be feminine too.

For example:

• باقة الزهور جميلة = The bouquet of flowers is beautiful

Here جميلة is feminine singular to agree with باقة.

Not perfectly. A very literal translation is:

Bouquet of the flowers between wedding gift and wedding cake.

But natural English needs:

• an expressed verb: is
• smoother noun phrases

So the natural translation is:

The bouquet of flowers is between the wedding gift and the wedding cake.

This is a common difference between Arabic and English: Arabic can be much more compact in present-tense nominal sentences.